phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './teatral/phpbb_sessions' is marked as crashed and last (automatic?) repair failed

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('b0db02bbefaf39ca7c3f5ea1fe0191da', -1, 1422245922, 1422245922, '36e3d64a', 62, 0, 0)

Line : 187
File : sessions.php