These issues occur when the Tape Server is added to a different Veeam Backup Server.
Veeam Backup & Replication does not support sharing tape devices with other Veeam Backup Servers.
To resolve this issue, reclaim the Tape Server with the Veeam Backup Server where errors occur.
If reclaiming ownership does not resolve the issue, please open a Veeam Support case.
This form is only for KB Feedback/Suggestions, if you need help with the software open a support case