API error - Value should be a number, but right now is a list of numbers

I have had an API endpoint receiving a json request for the passed 6 months or so, but now when I try to get the request, all the fields the receive a number and not accepting the same payload. The field is defined in on the bubble side as a number, in the db object as a number, and being submitted via API as a number…without quotes. Any help here would be great.