Problem witth database for urbackup

hi i have a problem with urbackup
it run but i have an error about data base
the erros is “an error occured while accessing or checking urbackup’s internal data base. this means this database is probably damaged or there is net enough free space. if this errore persist, please restore the dtabase(the file backup_server.deb backup_server_files.db, lackup_server_links.db, backup_server_link_journal.db and backup_server_setting.db) from a backup. see log files for detail”

now the backpus are going on but i have the same error message