phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('0028c2c4e6ab0533a79b8045047b568b', -1, 1713518067, 1713518067, '1275c4b8', 3, 0, 0)

Line : 187
File : sessions.php