diff --git a/src/main/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsBookingItemEntityValidator.java b/src/main/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsBookingItemEntityValidator.java
index 2e67a37c..d7e9fd1b 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsBookingItemEntityValidator.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsBookingItemEntityValidator.java
@@ -56,12 +56,12 @@ public class HsBookingItemEntityValidator extends HsEntityValidator<HsBookingIte
         final var maxValue = getNonNullIntegerValue(propDef, bookingItem.getResources());
         if (propDef.thresholdPercentage() != null ) {
             return totalValue > (maxValue * propDef.thresholdPercentage() / 100)
-                    ? "total %s is %d%s exceeds max total %s %d%s, which is above threshold of %d%%"
+                    ? "%s' total is %d%s, thus exceeds max total %s %d%s, which is above threshold of %d%%"
                         .formatted(propName, totalValue, propUnit, propName, maxValue, propUnit, propDef.thresholdPercentage())
                     : null;
         } else {
             return totalValue > maxValue
-                    ? "total %s is %d%s exceeds max total %s %d%s"
+                    ? "%s' total is %d%s, thus exceeds max total %s %d%s"
                     .formatted(propName, totalValue, propUnit, propName, maxValue, propUnit)
                     : null;
         }
diff --git a/src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsHostingAssetEntityValidator.java b/src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsHostingAssetEntityValidator.java
index 44d5fbfe..0757a3e3 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsHostingAssetEntityValidator.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsHostingAssetEntityValidator.java
@@ -60,7 +60,7 @@ public class HsHostingAssetEntityValidator extends HsEntityValidator<HsHostingAs
                 .reduce(0, Integer::sum);
         final var maxValue = getNonNullIntegerValue(propDef, hostingAsset.getConfig());
         return totalValue > maxValue
-                ? "total %s is %d%s exceeds max total %s %d%s".formatted(
+                ? "%s' total is %d%s, thus exceeds max total %s %d%s".formatted(
                 propName, totalValue, propUnit, propName, maxValue, propUnit)
                 : null;
     }
diff --git a/src/main/java/net/hostsharing/hsadminng/hs/validation/BooleanProperty.java b/src/main/java/net/hostsharing/hsadminng/hs/validation/BooleanProperty.java
index 416c65f5..9d664683 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/validation/BooleanProperty.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/validation/BooleanProperty.java
@@ -33,7 +33,7 @@ public class BooleanProperty extends ValidatableProperty<Boolean> {
         if (falseIf != null && propValue) {
             final Object referencedValue = props.get(falseIf.getKey());
             if (Objects.equals(referencedValue, falseIf.getValue())) {
-                result.add(propertyName + " is expected to be false because " +
+                result.add(propertyName + "' is expected to be false because " +
                         falseIf.getKey() + "=" + referencedValue + " but is " + propValue);
             }
         }
diff --git a/src/main/java/net/hostsharing/hsadminng/hs/validation/EnumerationProperty.java b/src/main/java/net/hostsharing/hsadminng/hs/validation/EnumerationProperty.java
index 9476e5bf..23e5ef61 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/validation/EnumerationProperty.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/validation/EnumerationProperty.java
@@ -33,7 +33,7 @@ public class EnumerationProperty extends ValidatableProperty<String> {
     @Override
     protected void validate(final ArrayList<String> result, final String propValue, final Map<String, Object> props) {
         if (Arrays.stream(values).noneMatch(v -> v.equals(propValue))) {
-            result.add(propertyName + " is expected to be one of " + Arrays.toString(values) + " but is '" + propValue + "'");
+            result.add(propertyName + "' is expected to be one of " + Arrays.toString(values) + " but is '" + propValue + "'");
         }
     }
 
diff --git a/src/main/java/net/hostsharing/hsadminng/hs/validation/HsEntityValidator.java b/src/main/java/net/hostsharing/hsadminng/hs/validation/HsEntityValidator.java
index a8d24a3f..0244df74 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/validation/HsEntityValidator.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/validation/HsEntityValidator.java
@@ -22,7 +22,8 @@ public abstract class HsEntityValidator<E> {
 
     protected static List<String> enrich(final String prefix, final List<String> messages) {
         return messages.stream()
-                .map(message -> prefix + "." + message)
+                // FIXME: this is a bit hacky, I need to find the right place to add the prefix
+                .map(message -> message.startsWith("'") ? message : ("'" + prefix + "." + message))
                 .toList();
     }
 
@@ -42,7 +43,7 @@ public abstract class HsEntityValidator<E> {
         final var result = new ArrayList<String>();
         properties.keySet().forEach( givenPropName -> {
             if (stream(propertyValidators).map(pv -> pv.propertyName).noneMatch(propName -> propName.equals(givenPropName))) {
-                result.add(givenPropName + " is not expected but is set to '" + properties.get(givenPropName) + "'");
+                result.add(givenPropName + "' is not expected but is set to '" + properties.get(givenPropName) + "'");
             }
         });
         stream(propertyValidators).forEach(pv -> {
diff --git a/src/main/java/net/hostsharing/hsadminng/hs/validation/IntegerProperty.java b/src/main/java/net/hostsharing/hsadminng/hs/validation/IntegerProperty.java
index 27661ff0..a1658ff9 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/validation/IntegerProperty.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/validation/IntegerProperty.java
@@ -39,13 +39,13 @@ public class IntegerProperty extends ValidatableProperty<Integer> {
     @Override
     protected void validate(final ArrayList<String> result, final Integer propValue, final Map<String, Object> props) {
         if (min != null && propValue < min) {
-            result.add(propertyName + " is expected to be >= " + min + " but is " + propValue);
+            result.add(propertyName + "' is expected to be >= " + min + " but is " + propValue);
         }
         if (max != null && propValue > max) {
-            result.add(propertyName + " is expected to be <= " + max + " but is " + propValue);
+            result.add(propertyName + "' is expected to be <= " + max + " but is " + propValue);
         }
         if (step != null && propValue % step != 0) {
-            result.add(propertyName + " is expected to be multiple of " + step + " but is " + propValue);
+            result.add(propertyName + "' is expected to be multiple of " + step + " but is " + propValue);
         }
     }
 
diff --git a/src/main/java/net/hostsharing/hsadminng/hs/validation/ValidatableProperty.java b/src/main/java/net/hostsharing/hsadminng/hs/validation/ValidatableProperty.java
index ae69f37e..7795d47d 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/validation/ValidatableProperty.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/validation/ValidatableProperty.java
@@ -92,7 +92,7 @@ public abstract class ValidatableProperty<T> {
         final var propValue = props.get(propertyName);
         if (propValue == null) {
             if (required) {
-                result.add(propertyName + " is required but missing");
+                result.add(propertyName + "' is required but missing");
             }
         }
         if (propValue != null){
@@ -100,7 +100,7 @@ public abstract class ValidatableProperty<T> {
                 //noinspection unchecked
                 validate(result, (T) propValue, props);
             } else {
-                result.add(propertyName + " is expected to be of type " + type + ", " +
+                result.add(propertyName + "' is expected to be of type " + type + ", " +
                         "but is of type '" + propValue.getClass().getSimpleName() + "'");
             }
         }
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsBookingItemEntityValidatorUnitTest.java b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsBookingItemEntityValidatorUnitTest.java
index 398e5330..0552e851 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsBookingItemEntityValidatorUnitTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsBookingItemEntityValidatorUnitTest.java
@@ -38,10 +38,10 @@ class HsBookingItemEntityValidatorUnitTest {
         // then
         assertThat(result).isInstanceOf(ValidationException.class)
                 .hasMessageContaining(
-                        "D-12345:test project:Test-Server.resources.CPUs is required but missing",
-                        "D-12345:test project:Test-Server.resources.RAM is required but missing",
-                        "D-12345:test project:Test-Server.resources.SSD is required but missing",
-                        "D-12345:test project:Test-Server.resources.Traffic is required but missing");
+                        "D-12345:test project:Test-Server.resources.CPUs' is required but missing",
+                        "D-12345:test project:Test-Server.resources.RAM' is required but missing",
+                        "D-12345:test project:Test-Server.resources.SSD' is required but missing",
+                        "D-12345:test project:Test-Server.resources.Traffic' is required but missing");
     }
 
     @Test
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsCloudServerBookingItemValidatorUnitTest.java b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsCloudServerBookingItemValidatorUnitTest.java
index 6a0f287e..cf10e3f9 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsCloudServerBookingItemValidatorUnitTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsCloudServerBookingItemValidatorUnitTest.java
@@ -45,7 +45,7 @@ class HsCloudServerBookingItemValidatorUnitTest {
         final var result = HsBookingItemEntityValidatorRegistry.doValidate(cloudServerBookingItemEntity);
 
         // then
-        assertThat(result).containsExactly("D-12345:Test-Project:Test-Server.resources.SLA-EMail is not expected but is set to 'true'");
+        assertThat(result).containsExactly("'D-12345:Test-Project:Test-Server.resources.SLA-EMail' is not expected but is set to 'true'");
     }
 
     @Test
@@ -109,10 +109,10 @@ class HsCloudServerBookingItemValidatorUnitTest {
 
         // then
         assertThat(result).containsExactlyInAnyOrder(
-                "D-12345:Test-Project:Test Cloud-Server.parentItem.total CPUs is 5 exceeds max total CPUs 4",
-                "D-12345:Test-Project:Test Cloud-Server.parentItem.total RAM is 30 GB exceeds max total RAM 20 GB",
-                "D-12345:Test-Project:Test Cloud-Server.parentItem.total SSD is 150 GB exceeds max total SSD 100 GB",
-                "D-12345:Test-Project:Test Cloud-Server.parentItem.total Traffic is 5500 GB exceeds max total Traffic 5000 GB"
+                "'D-12345:Test-Project:Test Cloud-Server.parentItem.CPUs' total is 5, thus exceeds max total CPUs 4",
+                "'D-12345:Test-Project:Test Cloud-Server.parentItem.RAM' total is 30 GB, thus exceeds max total RAM 20 GB",
+                "'D-12345:Test-Project:Test Cloud-Server.parentItem.SSD' total is 150 GB, thus exceeds max total SSD 100 GB",
+                "'D-12345:Test-Project:Test Cloud-Server.parentItem.Traffic' total is 5500 GB, thus exceeds max total Traffic 5000 GB"
         );
     }
 }
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsManagedServerBookingItemValidatorUnitTest.java b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsManagedServerBookingItemValidatorUnitTest.java
index 5d915722..994f4ec9 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsManagedServerBookingItemValidatorUnitTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsManagedServerBookingItemValidatorUnitTest.java
@@ -53,7 +53,7 @@ class HsManagedServerBookingItemValidatorUnitTest {
         final var result = HsBookingItemEntityValidatorRegistry.doValidate(mangedServerBookingItemEntity);
 
         // then
-        assertThat(result).containsExactly("D-12345:Test-Project:null.resources.SLA-EMail is expected to be false because SLA-Platform=BASIC but is true");
+        assertThat(result).containsExactly("'D-12345:Test-Project:null.resources.SLA-EMail' is expected to be false because SLA-Platform=BASIC but is true");
     }
 
     @Test
@@ -120,10 +120,10 @@ class HsManagedServerBookingItemValidatorUnitTest {
 
         // then
         assertThat(result).containsExactlyInAnyOrder(
-                "D-12345:Test-Project:null.parentItem.total CPUs is 5 exceeds max total CPUs 4",
-                "D-12345:Test-Project:null.parentItem.total RAM is 30 GB exceeds max total RAM 20 GB",
-                "D-12345:Test-Project:null.parentItem.total SSD is 150 GB exceeds max total SSD 100 GB",
-                "D-12345:Test-Project:null.parentItem.total Traffic is 5500 GB exceeds max total Traffic 5000 GB"
+                "'D-12345:Test-Project:null.parentItem.CPUs' total is 5, thus exceeds max total CPUs 4",
+                "'D-12345:Test-Project:null.parentItem.RAM' total is 30 GB, thus exceeds max total RAM 20 GB",
+                "'D-12345:Test-Project:null.parentItem.SSD' total is 150 GB, thus exceeds max total SSD 100 GB",
+                "'D-12345:Test-Project:null.parentItem.Traffic' total is 5500 GB, thus exceeds max total Traffic 5000 GB"
         );
     }
 
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsManagedWebspaceBookingItemValidatorUnitTest.java b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsManagedWebspaceBookingItemValidatorUnitTest.java
index c8db8a6f..dd9081ee 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsManagedWebspaceBookingItemValidatorUnitTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsManagedWebspaceBookingItemValidatorUnitTest.java
@@ -41,10 +41,10 @@ class HsManagedWebspaceBookingItemValidatorUnitTest {
 
         // then
         assertThat(result).containsExactlyInAnyOrder(
-                "D-12345:Test-Project:Test Managed-Webspace.resources.CPUs is not expected but is set to '2'",
-                "D-12345:Test-Project:Test Managed-Webspace.resources.RAM is not expected but is set to '25'",
-                "D-12345:Test-Project:Test Managed-Webspace.resources.SSD is required but missing",
-                "D-12345:Test-Project:Test Managed-Webspace.resources.SLA-EMail is not expected but is set to 'true'"
+                "'D-12345:Test-Project:Test Managed-Webspace.resources.CPUs' is not expected but is set to '2'",
+                "'D-12345:Test-Project:Test Managed-Webspace.resources.RAM' is not expected but is set to '25'",
+                "'D-12345:Test-Project:Test Managed-Webspace.resources.SSD' is required but missing",
+                "'D-12345:Test-Project:Test Managed-Webspace.resources.SLA-EMail' is not expected but is set to 'true'"
                 );
     }
 
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsPrivateCloudBookingItemValidatorTest.java b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsPrivateCloudBookingItemValidatorTest.java
index 40610fad..974f9d42 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsPrivateCloudBookingItemValidatorTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/validators/HsPrivateCloudBookingItemValidatorTest.java
@@ -91,10 +91,10 @@ class HsPrivateCloudBookingItemValidatorTest {
 
         // then
         assertThat(result).containsExactlyInAnyOrder(
-                "total CPUs is 5 exceeds max total CPUs 4",
-                "total RAM is 30 GB exceeds max total RAM 20 GB",
-                "total SSD is 150 GB exceeds max total SSD 100 GB",
-                "total Traffic is 5500 GB exceeds max total Traffic 5000 GB"
+                "CPUs' total is 5, thus exceeds max total CPUs 4",
+                "RAM' total is 30 GB, thus exceeds max total RAM 20 GB",
+                "SSD' total is 150 GB, thus exceeds max total SSD 100 GB",
+                "Traffic' total is 5500 GB, thus exceeds max total Traffic 5000 GB"
         );
     }
 
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAssetControllerAcceptanceTest.java b/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAssetControllerAcceptanceTest.java
index 3dc0a615..a2f1650c 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAssetControllerAcceptanceTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAssetControllerAcceptanceTest.java
@@ -279,10 +279,10 @@ class HsHostingAssetControllerAcceptanceTest extends ContextBasedTestWithCleanup
                             {
                                 "statusPhrase": "Bad Request",
                                 "message": "[
-                                          <<<MANAGED_SERVER:vm1400.config.extra is not expected but is set to '42',
-                                          <<<MANAGED_SERVER:vm1400.config.monit_max_ssd_usage is expected to be >= 10 but is 0,
-                                          <<<MANAGED_SERVER:vm1400.config.monit_max_cpu_usage is expected to be <= 100 but is 101,
-                                          <<<MANAGED_SERVER:vm1400.config.monit_max_ram_usage is required but missing
+                                          <<<'MANAGED_SERVER:vm1400.config.extra' is not expected but is set to '42',
+                                          <<<'MANAGED_SERVER:vm1400.config.monit_max_ssd_usage' is expected to be >= 10 but is 0,
+                                          <<<'MANAGED_SERVER:vm1400.config.monit_max_cpu_usage' is expected to be <= 100 but is 101,
+                                          <<<'MANAGED_SERVER:vm1400.config.monit_max_ram_usage' is required but missing
                                           <<<]"
                             }
                             """.replaceAll(" +<<<", "")));  // @formatter:on
@@ -334,7 +334,7 @@ class HsHostingAssetControllerAcceptanceTest extends ContextBasedTestWithCleanup
                                     {
                                         "statusPhrase": "Bad Request",
                                         "message": "[
-                                                 <<<UNIX_USER:fir01-extra.parentAsset.MANAGED_WEBSPACE:fir01.bookingItem.Multi=1 allows at maximum 25 unix users, but 26 found
+                                                 <<<'MANAGED_WEBSPACE:fir01.bookingItem.Multi=1 allows at maximum 25 unix users, but 26 found
                                                  <<<]"
                                     }
                                     """.replaceAll(" +<<<", "")));  // @formatter:on
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsCloudServerHostingAssetValidatorUnitTest.java b/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsCloudServerHostingAssetValidatorUnitTest.java
index db17d9cc..ee6644e0 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsCloudServerHostingAssetValidatorUnitTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsCloudServerHostingAssetValidatorUnitTest.java
@@ -28,7 +28,7 @@ class HsCloudServerHostingAssetValidatorUnitTest {
         final var result = validator.validate(cloudServerHostingAssetEntity);
 
         // then
-        assertThat(result).containsExactly("CLOUD_SERVER:vm1234.config.RAM is not expected but is set to '2000'");
+        assertThat(result).containsExactly("'CLOUD_SERVER:vm1234.config.RAM' is not expected but is set to '2000'");
     }
 
     @Test
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsManagedServerHostingAssetValidatorUnitTest.java b/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsManagedServerHostingAssetValidatorUnitTest.java
index 4a5eb400..b8e75436 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsManagedServerHostingAssetValidatorUnitTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsManagedServerHostingAssetValidatorUnitTest.java
@@ -30,9 +30,9 @@ class HsManagedServerHostingAssetValidatorUnitTest {
 
         // then
         assertThat(result).containsExactlyInAnyOrder(
-                "MANAGED_SERVER:vm1234.config.monit_max_ssd_usage is required but missing",
-                "MANAGED_SERVER:vm1234.config.monit_max_hdd_usage is expected to be of type class java.lang.Integer, but is of type 'String'",
-                "MANAGED_SERVER:vm1234.config.monit_max_cpu_usage is expected to be >= 10 but is 2",
-                "MANAGED_SERVER:vm1234.config.monit_max_ram_usage is expected to be <= 100 but is 101");
+                "'MANAGED_SERVER:vm1234.config.monit_max_cpu_usage' is expected to be >= 10 but is 2",
+                "'MANAGED_SERVER:vm1234.config.monit_max_ram_usage' is expected to be <= 100 but is 101",
+                "'MANAGED_SERVER:vm1234.config.monit_max_ssd_usage' is required but missing",
+                "'MANAGED_SERVER:vm1234.config.monit_max_hdd_usage' is expected to be of type class java.lang.Integer, but is of type 'String'");
     }
 }
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsManagedWebspaceHostingAssetValidatorUnitTest.java b/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsManagedWebspaceHostingAssetValidatorUnitTest.java
index 6e530bb3..d2e74894 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsManagedWebspaceHostingAssetValidatorUnitTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsManagedWebspaceHostingAssetValidatorUnitTest.java
@@ -73,7 +73,7 @@ class HsManagedWebspaceHostingAssetValidatorUnitTest {
         final var result = validator.validate(mangedWebspaceHostingAssetEntity);
 
         // then
-        assertThat(result).containsExactly("MANAGED_WEBSPACE:abc00.config.unknown is not expected but is set to 'some value'");
+        assertThat(result).containsExactly("'MANAGED_WEBSPACE:abc00.config.unknown' is not expected but is set to 'some value'");
     }
 
     @Test