ACR 15.1 Can't remove scheduled backup job

[Boby_86]

Hi!

I would like to ask your assistance:

There are no jobs in any crontabs but daily I receive a Major Alarm: "Job thread IOJob#X-arc (\\SMB location\\......) stalled. Cannot write." - where X is the job number.
Do you know how can I remove from the ACR to not try to run this old backup job?

CM 6.3
AES 6.3
ACR 15.1

Thank you in advance!