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 ('0cc537f40e0ba3dd78aac54a34626c69', -1, 1475089051, 1475089051, '36a0c63c', 5, 0, 0)

Line : 187
File : sessions.php