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 ('63bc3d0b4b2211a2338b8c33693c6750', -1, 1422328848, 1422328848, '3691b780', 6, 0, 0)

Line : 189
File : sessions.php