Sorry I forgot to add that the field type is a List, so no formatting. Nothing was changed on the column or list recently. Also, changing my script to SS2.1 works like it did previously, and going back to SS2.0 the issue returns.

you can try a support case, but this kind of thing is why i use strings for internal id numbers

NS in general is pretty good about handling number/string for internal ids, guess you found an edge case.

this is probably a case of the java backend showing, java is very specific on types

@Sandii I'd disagree. I've come across several places where I'm getting invalid format errors because NS is super inconsistent in how it expects numbers/ids to be handled.

I also always use a string for internal id numbers. In that way NS is very consistent if you look at any of the Internal IDs in the API Guide they are always shown as strings.