Error message when trying to edit a database record

Hello,
I have created a simple test application with RADSystem Standard Edition 8.7.0. This application uses Python Flask and a SQLite database. I added a few tables and pages to the application and then tested it.

Loading and displaying database records works very well, as does creating a new record. Unfortunately, I’m unable to edit the records. Each time I get the following error message.

It should be noted that I have also tested my application with a Postgresql database as well as an MSSQL database. I always get the same error. I also tried to start RadSystems in administrator mode. This didn’t work either.

Can you please help me?

what version of python are you using?

The global Python on my computer is version 3.11