1. Stop the Veeam Endpoint Backup Service
2. Create the RecreateDatabase registry entry (careful!)
Run regedit.exe and locate the Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Veeam\Veeam Endpoint Backup key / Veeam Agent Backup key
If RecreateDatabase is already there, just change the value to 1.
If RecreateDatabase is not already there, create it.
(this change takes effect immediately, but leave the registry editor open)
Name = RecreateDatabase Type = DWORD (32 bit) Value = 1
3. Start Veeam Endpoint Backup service
4. Verify the RecreateDatabase registry entry changed from 1 to 0
Since you already had regedit running, you may need to use F5 to refresh it, to get the new 0 value to show
5. Stop Veeam Endpoint Backup service
6. Start Veeam Endpoint Backup service.
7. Start Veeam Endpoint Backup UI to configure your „first“ backup