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 ('d14f5d3e36a06fd2b6e9feaeea2d3aa0', -1, 1713424406, 1713424406, '12dfcd3d', 6, 0, 0)

Line : 187
File : sessions.php