this is how it looks like in universal

i do have an item_stock_file_id in my item table but not item_stock_file_id_CustomGroupBy

Does anyone have an idea????

i fixed this by changing this:
 

to this:
 

although it’s stated down below that it is possible to do it that way, in my case it gave me that error:
 

Hi Tomothy,

Apologies for the late response, but glad that you found a workaround! 

This should be working in the Web GUI as well, so I don't really know what caused the issue here. Might have something to do with the column order or visibility. If you run into this again, please report a ticket including reproduction steps and we will research it further.