diff --git a/src/main/java/net/hostsharing/hsadminng/hs/office/coopassets/HsOfficeCoopAssetsTransactionController.java b/src/main/java/net/hostsharing/hsadminng/hs/office/coopassets/HsOfficeCoopAssetsTransactionController.java
index 4e2c6498..a0282c6c 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/office/coopassets/HsOfficeCoopAssetsTransactionController.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/office/coopassets/HsOfficeCoopAssetsTransactionController.java
@@ -157,6 +157,7 @@ public class HsOfficeCoopAssetsTransactionController implements HsOfficeCoopAsse
         }
     }
 
+    // TODO.refa: this logic needs to get extracted to a service
     final BiConsumer<HsOfficeCoopAssetsTransactionEntity, HsOfficeCoopAssetsTransactionResource> ENTITY_TO_RESOURCE_POSTMAPPER = (entity, resource) -> {
         resource.setMembershipUuid(entity.getMembership().getUuid());
         resource.setMembershipMemberNumber(entity.getMembership().getTaggedMemberNumber());
@@ -209,6 +210,7 @@ public class HsOfficeCoopAssetsTransactionController implements HsOfficeCoopAsse
                 });
     };
 
+    // TODO.refa: this logic needs to get extracted to a service
     final BiConsumer<HsOfficeCoopAssetsTransactionInsertResource, HsOfficeCoopAssetsTransactionEntity> RESOURCE_TO_ENTITY_POSTMAPPER = (resource, entity) -> {
 
         if (resource.getMembershipUuid() != null) {
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/office/coopassets/HsOfficeCoopAssetsTransactionControllerRestTest.java b/src/test/java/net/hostsharing/hsadminng/hs/office/coopassets/HsOfficeCoopAssetsTransactionControllerRestTest.java
index 1fdbe4f0..e6f91c85 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/office/coopassets/HsOfficeCoopAssetsTransactionControllerRestTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/office/coopassets/HsOfficeCoopAssetsTransactionControllerRestTest.java
@@ -65,9 +65,11 @@ class HsOfficeCoopAssetsTransactionControllerRestTest {
             .memberNumberSuffix(suffixOf(AVAILABLE_TARGET_MEMBER_NUMBER))
             .build();
 
-    // the following refs might change if impl changes
+    // The following refs depend on the implementation of the respective implementation and might change if it changes.
+    // The same TestUuidGenerator.ref(#) does NOT mean the UUIDs refer to the same entity,
+    // its rather coincidence because different test-cases have different execution paths in the production code.
     private static final UUID NEW_EXPLICITLY_CREATED_REVERSAL_ASSET_TX_UUID = TestUuidGenerator.ref(4);
-    private static final UUID NEW_EXPLICITLY_CREATED_TRANSFER_ASSET_TX_UUID = TestUuidGenerator.ref(5);
+    private static final UUID NEW_EXPLICITLY_CREATED_TRANSFER_ASSET_TX_UUID = TestUuidGenerator.ref(4);
 
     private static final UUID SOME_EXISTING_LOSS_ASSET_TX_UUID = TestUuidGenerator.use(3);
     public final HsOfficeCoopAssetsTransactionEntity SOME_EXISTING_LOSS_ASSET_TX_ENTITY = HsOfficeCoopAssetsTransactionEntity.builder()