vmError: Model Userfields, state with id Shipment not found

[iodurodisodio]

I do not understand how to solve this error: "vmError: Model Userfields, state with id Shipment not found" I am notified when I open the details of an order received in my shop, but not for all orders for some it happens for others not. Does anyone know the reason or a possible solution?
Thanks Alan

Joomla! 3.10.10
VirtueMart 4.0.2 10661

[jenkinhill]

As a guess, you may have a state which has a default entry of "shipment". Some users may overwrite this to select their correct state, others nay ignore it. Check the State shopper field details for a Default entry.

[Milbo]

It tries to load a state with the "id" "shipment", but an id is always a number. I think it is some 3rd party plugin which creates this.