phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('7642ff19dfd891d1e91f8a0ac6fff00a', -1, 1493067839, 1493067839, '3650e620', -1, 0, 0)

Line : 187
File : sessions.php