I tried it at master (commit 6e4ab9714cc0ca147f61997aa7b68f88185ade5c).
The following message was shown.
stack@devstack-master:/opt/devstack$ nova-manage cell_v2 update_cell --cell_uuid b97750a1-6fee-4a8b-a675-f4b3184ade71 --transport-url rabbit://openstack:XXX@172.16.1.19:5672/ The specified transport_url and/or database_connection combination already exists for another cell with uuid 00000000-0000-0000-0000-000000000000.
But the transport url should be updated in this case.
I tried it at master (commit 6e4ab9714cc0ca1 47f61997aa7b68f 88185ade5c) .
The following message was shown.
stack@devstack- master: /opt/devstack$ nova-manage cell_v2 update_cell --cell_uuid b97750a1- 6fee-4a8b- a675-f4b3184ade 71 --transport-url rabbit: //openstack: XXX@172. 16.1.19: 5672/ 0000-0000- 0000-0000000000 00.
The specified transport_url and/or database_connection combination already exists for another cell with uuid 00000000-
But the transport url should be updated in this case.