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 ('4867a984e82f48bf9bde4ef8b0757c54', -1, 1713616142, 1713616142, '0d3beae2', -4, 0, 0)

Line : 187
File : sessions.php