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 ('e8dd4f11f883ae7ab15cbd93223e1c24', -1, 1713427392, 1713427392, '12df9fc3', 0, 0, 0)

Line : 187
File : sessions.php