Error with backup on RoundCube, how to remove RoundCube from backup tasks

Hi All,

I updated everything to the latest versions (php, mysql, etc..) on my CentOS 6.8 installation.
After that i got errors with RoundCube (already during update of last version, segment fault)
Because of that i removed RoundCube directory and turn the option in custombuild to no

But the backup process is still complaining about it cannot backup RoundCube:
"RoundCube Backup Error: There is no da_roundcube database. Skipping RoundCube backup."

How can i remove this backup step from the backup progress.

Thank you,
Arno