Files deleted by files_retention are moved to invalid folder "data/files_trashbin/versions"

[mayonezo]

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Steps to reproduce

1. Setup files_retention flow
2. Wait until files_retention moves files to the trashbin automatically.
3. Watch error logs

Expected behaviour

files_retention moves deleted files to file owners trashbin.

Actual behaviour

Files are moved to an invalid folder and the log is full of errors:
"unable to rename, destination directory is not writable : /media/nextcloud_data/files_trashbin/versions"

Server configuration

Web server: Apache

Database: Maria 10.11.11

PHP version: 8.2.28

Nextcloud version: 31.0.7