Certificate is not valid for required scope (solved)

Hello,
after upgrade from 13.0.1 to 13.0.5 I get following message:
Some files did not pass the integritytests.
After clicking on the list-of-failed-files I get following Page:
Technical information
=====================
The following list covers which files have failed the integrity check. Please read
the previous linked documentation to learn more about the errors and how to fix
them.

Results
=======
- contacts_old
	- EXCEPTION
		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
		- Certificate is not valid for required scope. (Requested: contacts_old, current: CN=contacts)

Raw output
==========
Array
(
    [contacts_old] => Array
        (
            [EXCEPTION] => Array
                (
                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
                    [message] => Certificate is not valid for required scope. (Requested: contacts_old, current: CN=contacts)
                )

        )

)

I don’t know where to search for this problem.
I’ve found on the server filesystem following directorys:
nextcloud/data/updater-octwfmkva7ix/backups/nextcloud-13.0.1.1/apps/contacts
nextcloud/data/updater-octwfmkva7ix/backups/nextcloud-13.0.1.1/apps/contacts_old

That’s all I can find on the server. Can someone give me a hint what to do?
Actually it seems that the NC-Installation works correctly
Thanks in advance
glini

P.S. I found out that these directorys exist also in the normal apps directory. I tried to remove the contacts_old directory, but no change

Problem is solved, it seems the right solution was to delete the contacts_old directory, but because of caching, the error did not directly disappear. I tried some occ commands like files:cleanup and files:scan and maintenance:repair and somehow the message disappeared :wink:
So, no further help needed.