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 ('fa156c2d11f26c7581fe1f0df80e90fe', -1, 1714064200, 1714064200, '12bf87e0', -8, 0, 0)

Line : 187
File : sessions.php