There is some kind of 'artificial intelligence' built into the software that tries to detect renaming of fields in your data model and adapts all expressions accordingly. This usually can happen when there is a single field name changed in the model.
Unfortunately, I don't know how to switch off this kind of feature.
So it is more 1 but not much more SKU is the one that matches master data table with outbound or outbound. So the <bold> ones are unique and the others are from the master data table
The Storage script is like
But this one works without a problem.... At first I assumed it had to do with the fact that the dimensions are PO_Number & Order_Number both had the '_' but I also used a dummy dimensions. Same problem