Db.c:287 db_execute_sql: Error executing SQL: database is locked

I do a SSH backup/restore from our primary PBX to a backup. I just saw this on my backup server, I think it is related to the SQLite DB but does anyone have any suggestions? I am backing up and restoring that as part of the job.

WARNING[7559]: db.c:287 db_execute_sql: Error executing SQL: database is locked

bump

I rebooted and the message is gone, hopefully it won’t come back after the next restore.