SQL-DATABASE ERROR

Database error in pd Script: Invalid SQL: Insert Into pd_rechnung (sessionid, zeit, art) Values ('b8120nknoa5v0griqi0ivri6s5', 1751747876, 2)
mysql error: Field 'iduser' doesn't have a default value
mysql error number: 1364
Date: 05.07.2025 @ 22:37
Script: /rechnung_neu.php?step=2&art=2&phpMyAdmin=kSdVEcrW9JgLk8afnGhkZl7xHhe
Referer: