phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './osc_data/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 ('880d24d83d3b83b1f9f8218f07f2d49a', -1, 1422337442, 1422337442, '36a63edf', 1, 0, 0)

Line : 189
File : sessions.php