If I try to add a record with the allow add feature, I get the following error:
[{"x_id":83,"x_rasse_id":236,"x_typus_id":"6","x_farbe":"porzellan","x_abk":"porzellan","x_sortorder":9}]
If I close the dialog and reload the page (F5) the new Item could be selected from the dropdownlist.
It seems that the sql works, but the Javascript doesn't, and there is no error in the console.