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 ('5268384986b79c96c8bc9175d4b0f8e9', -1, 1713953454, 1713953454, '0315613d', 7, 0, 0)

Line : 187
File : sessions.php