fix permisions reading

contracts/admin.py

@@ -142,7 +142,7 @@ class ParentContractInlineMixin:
         if (
             obj is not None
             and not request.user.has_perm("contracts.delete_when_approved")
-            and not obj.is_editable_without_approve_permission
+            and not self.get_parent_object_is_editable()
         ):
             return False