Using Zapier Filtering for importing to knack selected records

Does anyone know what I am missing here. I have an API that is working fine but I am trying to filter the records so that items with “unattributed” are not allowed through.

All that happens is my zap stops. I am asking here because there may be someone that knows about this having worked with the knack API.

I am pretty sure I need to setup something else that sends other records through, but I have no idea what I need to do and Zapier documentation is sending me round in circles.