phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './forum/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 ('d8632246fe7c751a1bef5c6cee07a4da', -1, 1481127284, 1481127284, '36c5968f', 0, 0, 0)

Line : 186
File : sessions.php