Hi all,
I'm trying to update an Invoiced Product field (Units) in Dynamics Field Service. However, the standard logic I used to update lookup fields isn't working. I get the following error:

Here is my current step:

I have verified the guid is correct and that the Units(uom) entity has that record. I know I'm hitting the proper update record because if I remove that "Unit" code and just use the Invoice Product guid, the flow completes successfully.
Thoughts?