phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './forum/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 ('65be0f74ac4b1b44d24f2015ba0750d2', -1, 1511421815, 1511421815, '3691753c', 0, 0, 0)

Line : 189
File : sessions.php