"There is no row at position 0." error message when changing the sort_order of a property

Hi community,

does anyone what can cause this error message when editing item properties? -> "There is no row at position 0."

I have a carrier ItemType used for Federation were I use a couple of custom properties. One is a "source_id" look-a-like property. But it´s not the original one from a relationship ItemType.
Anyway - when I change the sort_order of the source_id property, I get the shown error message.

In the past I have seen the error message randomly for all kind of system properties. It´s a error that is typically thrown by SQL. I sometimes get the error message when changing the sort_order setting, but not always. It´s pretty random.

Does anyone know more?

Thanks!
Angela