@@ -0,0 +132,4 @@
+        final var expectedSubAssetResource = new HsHostingAssetSubInsertResource();
+        expectedSubAssetResource.setType(givenSubAssetResource.getType());
+        if ( !convert.from(givenSubAssetResource).equals(convert.from(expectedSubAssetResource)) ) {
+            throw new ValidationException("sub asset " + givenSubAssetResource.getType() + " is over-specified, in compatibilty mode, only default values allowed");

@@ -59,2 +62,4 @@
+                    nullable: false
                 type:
                     $ref: '#/components/schemas/HsBookingItemType'
+                identifier:

@@ -61,0 +68,4 @@
+                    maxLength: 80
+                    nullable: false
+                    description: only used as a default value for automatically created hosting assets, not part of the booking item
+                assignedToHostingAssetUuid:

@@ -503,3 +503,3 @@
         final var idsToRemove = new HashSet<Integer>();
         relations.forEach((id, r) -> {
-            if (r.getHolder() == r.getAnchor()) {
+            if (r.getType() == HsOfficeRelationType.REPRESENTATIVE && r.getHolder() == r.getAnchor()) {