phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './kidnem998/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 ('64e9acee6834b9e6647fee6ed2483f87', -1, 1475002342, 1475002342, '36dd517d', -1, 0, 0)

Line : 187
File : sessions.php