Issue Plesk backup FTP settings issue

[Philco]

For over a year I have been doing daily planned backups to my FTP storage server without any problem.
2 months ago, the FTP server IP changed.
I updated the IP address in the remote storage settings and Plesk can connect without problem.
The daily backups are running and the backup files are on my FTP server.

Yet, every day I receive a warning email that Plesk was unable to do the backup of my FTP server.
But the server mentioned is the old server with the old IP.

I have looked around but can't find any place on the portal where there is still a mention of the old parameters.
Any clue as to where I could find this hidden/old parameter or what file I should try to find to adapt manually?

 

[Bitpalast]

Have you checked the entries in the "BackupsScheduled" table of the psa database? You can see all backups there.