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 ('71f6a0978de3df6d63a27e9b807463c5', -1, 1713962385, 1713962385, '039177c7', -6, 0, 0)

Line : 187
File : sessions.php