diff --git a/src/main/resources/api-definition/hs-booking/hs-booking-item-schemas.yaml b/src/main/resources/api-definition/hs-booking/hs-booking-item-schemas.yaml
index a9f946b7..06f8b921 100644
--- a/src/main/resources/api-definition/hs-booking/hs-booking-item-schemas.yaml
+++ b/src/main/resources/api-definition/hs-booking/hs-booking-item-schemas.yaml
@@ -21,7 +21,6 @@ components:
                     $ref: '#/components/schemas/BookingResources'
             required:
                 - uuid
-                - debitor
                 - validFrom
                 - validTo
                 - resources
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/HsBookingItemControllerAcceptanceTest.java b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/HsBookingItemControllerAcceptanceTest.java
index 55bdbb2c..cbd56570 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/HsBookingItemControllerAcceptanceTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/HsBookingItemControllerAcceptanceTest.java
@@ -278,78 +278,6 @@ class HsBookingItemControllerAcceptanceTest extends ContextBasedTestWithCleanup
                         return true;
                     });
         }
-
-        @Test
-        void globalAdmin_canPatchJustValidToOfArbitraryBookingItem() {
-
-            context.define("superuser-alex@hostsharing.net");
-            final var givenBookingItem = givenSomeTemporaryBookingItemForDebitorNumber(1000111, entry("something", 1));
-
-            RestAssured // @formatter:off
-                .given()
-                    .header("current-user", "superuser-alex@hostsharing.net")
-                    .contentType(ContentType.JSON)
-                    .body("""
-                           {
-                               "validTo": "2022-12-31"
-                           }
-                          """)
-                    .port(port)
-                .when()
-                    .patch("http://localhost/api/hs/booking/items/" + givenBookingItem.getUuid())
-                .then().log().all().assertThat()
-                    .statusCode(200)
-                    .contentType(ContentType.JSON)
-                    .body("", lenientlyEquals("""
-                        {
-                            "caption": "some test-booking",
-                            "validFrom": "2022-11-01",
-                            "validTo": "2022-12-31",
-                            "resources": {
-                                "something": 1
-                            }
-                        }
-                    """)); // @formatter:on
-
-            // finally, the bookingItem is actually updated
-            assertThat(bookingItemRepo.findByUuid(givenBookingItem.getUuid())).isPresent().get()
-                    .matches(mandate -> {
-                        assertThat(mandate.getDebitor().toString()).isEqualTo("debitor(D-1000111: rel(anchor='LP First GmbH', type='DEBITOR', holder='LP First GmbH'), fir)");
-                        assertThat(mandate.getValidity().asString()).isEqualTo("[2022-11-01,2023-01-01)");
-                        return true;
-                    });
-        }
-
-        @Test
-        void globalAdmin_canNotPatchReferenceOfArbitraryBookingItem() {
-
-            context.define("superuser-alex@hostsharing.net");
-            final var givenBookingItem = givenSomeTemporaryBookingItemForDebitorNumber(1000111, entry("something", 1));
-
-            final var location = RestAssured // @formatter:off
-                .given()
-                    .header("current-user", "superuser-alex@hostsharing.net")
-                    .contentType(ContentType.JSON)
-                    .body("""
-                           {
-                               "reference": "temp ref CAT new"
-                           }
-                           """)
-                    .port(port)
-                .when()
-                    .patch("http://localhost/api/hs/booking/items/" + givenBookingItem.getUuid())
-                .then().assertThat()
-                    // TODO.impl: I'd prefer a 400,
-                    //      but OpenApi Spring Code Gen does not convert additonalProperties=false into a validation
-                    .statusCode(200); // @formatter:on
-
-            // finally, the bookingItem is actually updated
-            assertThat(bookingItemRepo.findByUuid(givenBookingItem.getUuid())).isPresent().get()
-                    .matches(mandate -> {
-                        assertThat(mandate.getValidity().asString()).isEqualTo("[2022-11-01,2023-03-31)");
-                        return true;
-                    });
-        }
     }
 
     @Nested
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/HsBookingItemRepositoryIntegrationTest.java b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/HsBookingItemRepositoryIntegrationTest.java
index ad112896..9a5eaf00 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/booking/item/HsBookingItemRepositoryIntegrationTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/booking/item/HsBookingItemRepositoryIntegrationTest.java
@@ -121,17 +121,17 @@ class HsBookingItemRepositoryIntegrationTest extends ContextBasedTestWithCleanup
                             "{ grant perm:hs_booking_item#D-1000111:some new booking item:DELETE to role:global#global:ADMIN by system and assume }",
 
                             // owner
+                            "{ grant perm:hs_booking_item#D-1000111:some new booking item:UPDATE to role:hs_booking_item#D-1000111:some new booking item:OWNER by system and assume }",
+                            "{ grant role:hs_booking_item#D-1000111:some new booking item:OWNER to role:relation#FirstGmbH-with-DEBITOR-FirstGmbH:AGENT by system and assume }",
 
                             // admin
+                            "{ grant role:hs_booking_item#D-1000111:some new booking item:ADMIN to role:hs_booking_item#D-1000111:some new booking item:OWNER by system and assume }",
 
                             // tenant
-
-                            "{ grant perm:hs_booking_item#D-1000111:some new booking item:SELECT to role:hs_booking_item#D-1000111:some new booking item:TENANT by system and assume }",
-                            "{ grant perm:hs_booking_item#D-1000111:some new booking item:UPDATE to role:hs_booking_item#D-1000111:some new booking item:OWNER by system and assume }",
-                            "{ grant role:hs_booking_item#D-1000111:some new booking item:ADMIN to role:hs_booking_item#D-1000111:some new booking item:OWNER by system and assume }",
-                            "{ grant role:hs_booking_item#D-1000111:some new booking item:OWNER to role:relation#FirstGmbH-with-DEBITOR-FirstGmbH:AGENT by system and assume }",
                             "{ grant role:hs_booking_item#D-1000111:some new booking item:TENANT to role:hs_booking_item#D-1000111:some new booking item:ADMIN by system and assume }",
+                            "{ grant perm:hs_booking_item#D-1000111:some new booking item:SELECT to role:hs_booking_item#D-1000111:some new booking item:TENANT by system and assume }",
                             "{ grant role:relation#FirstGmbH-with-DEBITOR-FirstGmbH:TENANT to role:hs_booking_item#D-1000111:some new booking item:TENANT by system and assume }",
+
                             null));
         }
 
@@ -299,8 +299,8 @@ class HsBookingItemRepositoryIntegrationTest extends ContextBasedTestWithCleanup
         // then
         assertThat(customerLogEntries).map(Arrays::toString).contains(
                 "[creating booking-item test-data 1000111, hs_booking_item, INSERT]",
-                "[creating booking-item test-data 1000111, hs_booking_item, INSERT]",
-                "[creating booking-item test-data 1000111, hs_booking_item, INSERT]");
+                "[creating booking-item test-data 1000212, hs_booking_item, INSERT]",
+                "[creating booking-item test-data 1000313, hs_booking_item, INSERT]");
     }
 
     private HsBookingItemEntity givenSomeTemporaryBookingItem(final int debitorNumber) {