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 ('c78116cbee9cbba607a0157eb6ce32d5', -1, 1425144203, 1425144203, '36a61870', -1, 0, 0)

Line : 172
File : sessions.php