Error when trying to import

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1 
save failed: [Errno 1] Operation not permitted
error writing /music/Tool/Undertow/01 - Intolerance.flac: [Errno 1] Operation not permitted
Sending event: before_item_moved
Sending event: item_moved
Sending event: database_change
Sending event: database_change
Sending event: write
save failed: [Errno 1] Operation not permitted```

I'm running beets in a docker.

this is the command im using
docker exec -it beets /bin/bash -c 'beet -v import /music/Metal/Tool/"Undertow (1993)"/'
this is the file permissions -rw-rw-r--
it is under my user
It moves the files, but doesn't add tags to it. The main thing I want to add is albumart.
2

Please check the permissions both on the original file and the destination directory.