diff --git a/cinder/objects/request_spec.py b/cinder/objects/request_spec.py
index 58b719aa8d7..1e3859a28b0 100644
--- a/cinder/objects/request_spec.py
+++ b/cinder/objects/request_spec.py
@@ -12,6 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from oslo_utils import versionutils
 from oslo_versionedobjects import fields
 
 from cinder import objects
@@ -88,6 +89,17 @@ class RequestSpec(base.CinderObject, base.CinderObjectDictCompat,
 
         return spec_obj
 
+    def obj_make_compatible(self, primitive, target_version):
+        """Make an object representation compatible with target version."""
+        super(RequestSpec, self).obj_make_compatible(primitive, target_version)
+        target_version = versionutils.convert_version_to_tuple(target_version)
+        added_fields = (((1, 1), ('group_id', 'group_backend')),
+                        ((1, 2), ('resource_backend')))
+        for version, remove_fields in added_fields:
+            if target_version < version:
+                for obj_field in remove_fields:
+                    primitive.pop(obj_field, None)
+
 
 @base.CinderObjectRegistry.register
 class VolumeProperties(base.CinderObject, base.CinderObjectDictCompat):