phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './db_mtss3/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 ('40a8a9843c931e3a582247ba3e464d69', -1, 1513374779, 1513374779, '36524f6d', 12, 0, 0)

Line : 187
File : sessions.php