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 ('ae175a9daf2a9375ba4a518ba3b4fecf', -1, 1413880990, 1413880990, '365252c9', -4, 0, 0)

Line : 187
File : sessions.php