phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1194 Table '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 ('ff5f88a123c291671c2236c6f223e2cc', -1, 1413985683, 1413985683, '36ccf9b8', -1, 0, 0)

Line : 172
File : sessions.php