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 ('1c221b6e55262f2f8e101e4635dccb9e', -1, 1713579643, 1713579643, '0d3a248d', -4, 0, 0)

Line : 187
File : sessions.php