phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './stadia_gr_@002d_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 ('08e22f8beb3de3fe908dece7e8f0efbb', -1, 1493590934, 1493590934, '36915169', 5, 0, 0)

Line : 187
File : sessions.php