As many of you saw the thread here on the community - Potential Bugs being found in VCC 12.2 | Veeam Community Resource Hub
There were support cases opened with Veeam for those of us that deploy Veeam Cloud Connect and a forum post as well - https://forums.veeam.com/cloud-connect-backup-f43/vcc-service-provider-issue-with-tenants-post-12-2-upgrade-t95372.html?sid=cfda2d0f2e174a9101cc69358aef31e1
Veeam has released today the KB with the hotfix that addresses the issue so if you have not upgraded to 12.2 then you can upgrade and apply the hotfix before allowing tenants access again to not have the issue. If you have the issue you need to work with support on DB cleanup.