Shell Command stopped working

Hello,

I have added a shell_command, this one

shell_command:
  doorbell_removeold: "find /media/doorbell/* -type f -mtime +5 -exec rm {} -f \\;"

to remove old files, and last week it was working, but now it stopped working.

To be sure whitelisted external dirs

homeassistant:
  media_dirs:
    doorbell: /media/doorbell
  whitelist_external_dirs:
    - /media/doorbell/

but I didn’t think it was needed.
the command doesn’t give me an error or any kind of response while testing in dev tools.

ok,

-mtime +5

means everything older then 6 days, not 5, that’s why my files weren’t removed yet.