phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './db123504/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 ('6c51f10abf8386af1b1e24e92b39c0bd', -1, 1513277749, 1513277749, '36a3d2aa', 330, 0, 0)

Line : 187
File : sessions.php