please someone, any ideas?

engine-backup --mode=restore --file=backup --log=log_file_name --provision-db --restore-permissions
Preparing to restore:
- Unpacking file 'backup'
Restoring:
- Files
Provisioning PostgreSQL users/databases:
- user 'engine', database 'engine'
FATAL: Existing database 'engine' or user 'engine' found and temporary ones created - Please clean up everything and try again