phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './mediest_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 ('b4e4c22adaa9e7f9e6de746c4b11d093', -1, 1417069589, 1417069589, '365352bf', 2, 0, 0)

Line : 187
File : sessions.php