Group delete in Openflow 1.3.1 not working with Ovs2.4/2.5

Apparently in order to delete a group, application deletes the group from the datastore. FRM sends down group mod with the data in datastore including buckets and command = delete/delete strict. Such a group delete request is rejected by Ovs2.5, which is based on Openflow 1.3.5 with error invalid group id.

Even the specification says that Openflow 1.3.5 says:
“If a delete request includes some buckets in the Group-Mod message, then the switch must return an ofp_error_msg with OFPET_GROUP_MOD_FAILED type and OFPGMFC_INVALID_GROUP code.”