phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './mw_phpbb/phpbb_mw_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb_mw_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('df8d3f0a5019fe63743b98d5db859c15', -1, 1490554492, 1490554492, '36d3ee2c', 6, 0, 0)

Line : 187
File : sessions.php