phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpbb/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 ('2798df285d7e70b5e881160ee24fa58d', -1, 1484770550, 1484770550, '36928bc9', -1, 0, 0)

Line : 187
File : sessions.php