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 ('330977ca8767bd1fe8f539f2de0b3b76', -1, 1714842129, 1714842129, '12db166b', -8, 0, 0)

Line : 187
File : sessions.php