phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('f3fddff33596895a3e12aaa1ad9ba816', -1, 1748752230, 1748752230, 'd849d813', 5, 0, 0)

Line : 187
File : sessions.php