[Bug]: Error while running background job ExpireVersions - Missing permissions to delete version

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Error while running background job (class: OCA\Files_Versions\BackgroundJob\ExpireVersion: Exception OCP\Files\NotPermittedException
(86 occurrences in 2 days)

Steps to reproduce

This happens if you have a S3 as primary storage. See background job logs

Expected behavior

I dont see the error.

A solution would be:
https://github.com/nextcloud/server/blob/master/apps/files_versions/lib/Storage.php#L596

• to put that line inside a try/catch in order to catch the NotPermittedException, so that it does not exit the loop as soon as an exception like that is thrown
• in the catch, to add an error log message indicating the file id and the exception type

Installation method

None

Nextcloud Server version

28

Operating system

None

PHP engine version

None

Web server

None

Database engine version

None

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

No response

Start in apps/files_versions/lib/Storage.php around line 596 and trace how the ExpireVersion background job reaches that operation for S3 primary storage. Done means a NotPermittedException no longer stops the deletion loop and the catch records the file ID and exception type in the error log.