Within those 1,900 lines there are only say 10 unique values. From the selection made in dropdown1, dropdown2 will then show the next available options and so on.
Here’s a snip of the collection i’m working with…
and the dropdowns:
The idea is to get the user to make a selection which narrows down to the “Groups” field, then a repeater/table will populate based on the “Sizes” within that “Group” field.