CentOS - Mar 2020 - C8 and bacula messages

Hi list,

I'm updating my backup server using C8 and bacula 9.0.6.
I have problem when I run a full backup with a pool that has Maximum 
Volume Jobs = 1 as in the configuration used on C7. The problem is that 
I get this message:

JobId 11: Max Volume jobs=1 exceeded. Marking Volume "Full-0009" as
Used.

multiple time inside bacula messages when backup is performing?

Is this a bug or is a misconfiguration?


Thanks in advance.