phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './grom_forum/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 ('8ed9a5e77424e73d0ac68868a4b70480', -1, 1487768733, 1487768733, '36a60e56', 1, 0, 0)

Line : 189
File : sessions.php