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 ('51352033899c98fc42fefe1a0dfe8d74', -1, 1422337383, 1422337383, '36a63edf', 1, 0, 0)

Line : 189
File : sessions.php