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 ('1e9b037c527f8a8d19d324094f7be2ba', -1, 1713925504, 1713925504, '127783b2', -4, 0, 0)

Line : 187
File : sessions.php