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 ('21eb6d3b106e568eac61a59d82a56272', -1, 1713415331, 1713415331, '340ee0c5', -4, 0, 0)

Line : 187
File : sessions.php