"value given is empty" when using changesetArray

I saw this post of on how to use changesetArray to support auditing tables, but get the below error. table2 is the just above table4. Any ideas? I'm a beginner Retool user and the answer may be very basic

Have you made any changes to the data in Table2? It's not changes "in retool" - that is, to the objects and stuff, it's when you've made the table column(s) editable clicked on one, and changed the value.

Retool stores data in the changesetArray and changesetObject. You can right-click on Table2 and choose view state, which will allow you to see the data that has changed.