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 ('facb0bbbf6e1a8b7ef508c8ebb11549f', -1, 1714616779, 1714616779, '12d96d97', -4, 0, 0)

Line : 187
File : sessions.php