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 ('84cc5da949cd9b6b34639d989880c89f', -1, 1485138144, 1485138144, '36d370b1', -1, 0, 0)

Line : 172
File : sessions.php