src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAssetEntity.java

@@ -29,6 +29,7 @@ import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
 import jakarta.persistence.OneToMany;
 import jakarta.persistence.OneToOne;
+import jakarta.persistence.PostLoad;
 import jakarta.persistence.Table;
 import jakarta.persistence.Transient;
 import jakarta.persistence.Version;
@@ -120,12 +121,20 @@ public class HsHostingAssetEntity implements Stringifyable, RbacObject {
     @Transient
     private PatchableMapWrapper<Object> configWrapper;
 
+    @Transient
+    private boolean isLoaded = false;
+
+    @PostLoad
+    public void markAsLoaded() {
+        this.isLoaded = true;
+    }
+
     public PatchableMapWrapper<Object> getConfig() {
         return PatchableMapWrapper.of(configWrapper, (newWrapper) -> {configWrapper = newWrapper; }, config );
     }
 
-    public void putConfig(Map<String, Object> newConfg) {
+    public void putConfig(Map<String, Object> newConfig) {
-        PatchableMapWrapper.of(configWrapper, (newWrapper) -> {configWrapper = newWrapper; }, config).assign(newConfg);
+        PatchableMapWrapper.of(configWrapper, (newWrapper) -> {configWrapper = newWrapper; }, config).assign(newConfig);
     }
 
     @Override

src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsManagedWebspaceHostingAssetValidator.java

@@ -17,6 +17,10 @@ class HsManagedWebspaceHostingAssetValidator extends HsHostingAssetEntityValidat
 
     @Override
     protected Pattern identifierPattern(final HsHostingAssetEntity assetEntity) {
-        return Pattern.compile("^" + assetEntity.getParentAsset().getBookingItem().getProject().getDebitor().getDefaultPrefix() + "[0-9][0-9]$");
+        final var prefixPattern =
+                !assetEntity.isLoaded()
+                        ? assetEntity.getParentAsset().getBookingItem().getProject().getDebitor().getDefaultPrefix()
+                        : "[a-z][a-z0-9][a-z0-9]";
+        return Pattern.compile("^" + prefixPattern + "[0-9][0-9]$");
     }
 }

src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAssetRepositoryIntegrationTest.java

@@ -90,6 +90,7 @@ class HsHostingAssetRepositoryIntegrationTest extends ContextBasedTestWithCleanu
             result.assertSuccessful();
             assertThat(result.returnedValue()).isNotNull().extracting(HsHostingAssetEntity::getUuid).isNotNull();
             assertThatAssetIsPersisted(result.returnedValue());
+            assertThat(result.returnedValue().isLoaded()).isFalse();
             assertThat(assetRepo.count()).isEqualTo(count + 1);
         }
 
@@ -413,5 +414,6 @@ class HsHostingAssetRepositoryIntegrationTest extends ContextBasedTestWithCleanu
         assertThat(actualResult)
                 .extracting(HsHostingAssetEntity::toString)
                 .contains(serverNames);
+        actualResult.forEach(loadedEntity -> assertThat(loadedEntity.isLoaded()).isTrue());
     }
 }

src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsManagedWebspaceHostingAssetValidatorUnitTest.java

@@ -54,6 +54,28 @@ class HsManagedWebspaceHostingAssetValidatorUnitTest {
             ))
             .build();
 
+    @Test
+    void acceptsAlienIdentifierPrefixForPreExistingEntity() {
+        // given
+        final var validator = HsHostingAssetEntityValidatorRegistry.forType(MANAGED_WEBSPACE);
+        final var mangedWebspaceHostingAssetEntity = HsHostingAssetEntity.builder()
+                .type(MANAGED_WEBSPACE)
+                .bookingItem(HsBookingItemEntity.builder()
+                        .type(HsBookingItemType.MANAGED_WEBSPACE)
+                        .resources(Map.ofEntries(entry("SSD", 25), entry("Traffic", 250)))
+                        .build())
+                .parentAsset(mangedServerAssetEntity)
+                .identifier("xyz00")
+                .isLoaded(true)
+                .build();
+
+        // when
+        final var result = validator.validate(mangedWebspaceHostingAssetEntity);
+
+        // then
+        assertThat(result).isEmpty();
+    }
+
     @Test
     void validatesIdentifierAndReferencedEntities() {
         // given