phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './newklub31/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 ('4b51e118c185be0fa80f3cf8002329a2', -1, 1475137198, 1475137198, '36c4df2a', -4, 0, 0)

Line : 187
File : sessions.php