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 ('d0a0c387f37e03a4802c4582a92f8d00', -1, 1425077664, 1425077664, '36c581f2', 5, 0, 0)

Line : 187
File : sessions.php