Failed to create resource provider

HI,

We have an openstack ansible rocky 18.1.2 setup. It was working working fine. As part of an upgrade
we have reinstalled it. Now we are unable to create any vms. We have four compute nodes.
When we try to create a vm on a specific compute node, it is failing, showing no host found in the nova-conductor and scheduler logs. When I observed the nova-compute log on the compute, we have found the following errors:

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2020-05-04 12:59:55.800 11245 ERROR nova.scheduler.client.report [req-40cd6d9d-3fb5-4a85-b348-53705f22148e - - - - -] [req-68c57117-a4b0-46b2-a75b-36e8d665da38] Failed to create resource provider record in placement API for UUID 7e6fb27c-ed5b-4c2c-8373-c99e98da7bcc. Got 409: {"errors": [{"status": 409, "request_id": "req-68c57117-a4b0-46b2-a75b-36e8d665da38", "detail": "There was a conflict when trying to complete your request.\n\n Conflicting resource provider name: b2b.blr.example.cloud already exists. ", "title": "Conflict"}]}.

2020-05-04 12:59:55.801 11245 ERROR nova.compute.manager raise exception.ResourceProviderCreationFailed(name=name)
2020-05-04 12:59:55.801 11245 ERROR nova.compute.manager ResourceProviderCreationFailed: Failed to create resource provider b2b.blr.example.cloud
2020-05-04 12:59:55.801 11245 ERROR nova.compute.manager
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Can you help us solve this error ?

Thanks
Kumar