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 ('de0cc88af9aa08c50f2a180017cf679a', -1, 1713459063, 1713459063, '0311a510', -10, 0, 0)

Line : 187
File : sessions.php