SQL-DATABASE ERROR

Database error in pd Script: Invalid SQL: Insert Into pd_rechnung (sessionid, zeit, art) Values ('7q0l0bsrj817bfb2jmt8nqbh65', 1713444838, 2)
mysql error: Field 'iduser' doesn't have a default value
mysql error number: 1364
Date: 18.04.2024 @ 14:53
Script: /rechnung_neu.php?step=2&art=2&phpMyAdmin=kSdVEcrW9JgLk8afnGhkZl7xHhe
Referer: