phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './myforum/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 ('f81f9baec35c527278c93ff0d6b7a421', -1, 1783721519, 1783721519, 'd849d8f3', -9, 0, 0)

Line : 187
File : sessions.php