when group refcnt > 1, then table=5 and group table don't delete

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when group refcnt > 1, then table=5 and group table don't delete

Let's conside the folowing situation:
Port Chain 1: PG1->PG2->PG3->PG4
Port Chain 2: PG5->PG3->PG4

As above examples, the the next_group_id of PG2 and PG5 is PG3, so the group_refcnt is 2. Meanwhile, let's assume that
the PG3 contains two port-pair PP5 and PP6. As the result,there are some flow tables below:

For PG2 and PG5, the group table is same as below:
group_id=3,type=select,buckets=bucket=weight=1,mod_dl_dst=PP5 ingress MAC,resubmit(,5),
                       buckets=bucket=weight=1,mod_dl_dst=PP6 ingress MAC,resubmit(,5)

For PG2, the table=5 as below:
table=5,priority=0,dl_dst=PP5 ingress MAC,eth_type=IP,actions=mod_vlan_vid:xxx, push_mpls:0x8847,set_mpls_label=label1, ttl=ttl1,resubmit(,10)
table=5,priority=0,dl_dst=PP6 ingress MAC,eth_type=IP,actions=mod_vlan_vid:xxx, push_mpls:0x8847,set_mpls_label=label1, ttl=ttl1,resubmit(,10)

For PG5, the table=5 as below:
table=5,priority=0,dl_dst=PP5 ingress MAC,eth_type=IP,actions=mod_vlan_vid:xxx, push_mpls:0x8847,set_mpls_label=label2, ttl=ttl2,resubmit(,10)
table=5,priority=0,dl_dst=PP6 ingress MAC,eth_type=IP,actions=mod_vlan_vid:xxx, push_mpls:0x8847,set_mpls_label=label2, ttl=ttl2,resubmit(,10)

So, the flow of table 5 has the same match fields, but different mpls label and ttl. How to distinguish this condition. I think this is a bug,
because ovs can not support flow table 5 with the same match fields but with different actions. Even if the ovs support, when user delete port chian1,
because the group refcnt is larger than 1, so the table 5 of PG2 cannot delete, so this is a bug.

Do you think?