백업 실패: .tar 권한 문제

디스코urse 백업을 할 수 없어요. 여러 번 시도해 봤는데 같은 오류가 계속 발생하네요. 로그는 다음과 같습니다.

    [2021-03-04 08:24:58] Finalizing backup...
    [2021-03-04 08:24:58] Creating archive: how-to-discuss-2021-03-04-082415-v20210302164429.tar.gz
    [2021-03-04 08:24:58] Making sure archive does not already exist...
    [2021-03-04 08:24:58] Creating empty archive...
    [2021-03-04 08:24:58] EXCEPTION: lib/discourse.rb:93:in `exec': tar: /var/www/discourse/public/backups/default/how-to-discuss-2021-03-04-082415-v20210302164429.tar: Cannot open: Permission denied
    tar: Error is not recoverable: exiting now

    [2021-03-04 08:24:58] lib/discourse.rb:103:in `execute_command'
    lib/discourse.rb:93:in `exec'
    lib/discourse.rb:43:in `execute_command'
    /var/www/discourse/lib/backup_restore/backuper.rb:202:in `create_archive'
    /var/www/discourse/lib/backup_restore/backuper.rb:40:in `run'
    /var/www/discourse/script/spawn_backup_restore.rb:9:in `backup'
    /var/www/discourse/script/spawn_backup_restore.rb:34:in `block in <main>'
    /var/www/discourse/script/spawn_backup_restore.rb:4:in `fork'
    /var/www/discourse/script/spawn_backup_restore.rb:4:in `<main>'
    [2021-03-04 08:24:58] Deleting old backups...
    [2021-03-04 08:24:58] Cleaning stuff up...
    [2021-03-04 08:24:58] Removing '.tar' leftovers...
    [2021-03-04 08:24:58] Marking backup as finished...
    [2021-03-04 08:24:58] Refreshing disk stats...
    [2021-03-04 08:24:59] Notifying 'HowToDiscuss' of the end of the backup...

도와주세요🙁

주요 오류는 다음과 같습니다.

EXCEPTION: lib/discourse.rb:93:in exec: tar: /var/www/discourse/public/backups/default/how-to-discuss-2021-03-04-084222-v20210302164429.tar: Cannot open: Permission denied

discourse가 파일을 생성하면서 잘못된 권한을 부여하고 있습니다.
해결책이 있을까요???

/var/discourse/shared/standalone/backups/ 디렉터리에서 기본 디렉터리를 삭제하니 문제가 해결되었습니다