If you update just the match field used in the look up's relationship for just the field where you want to relookup data, only the fields in that record will update.
This "update" need not change the value in the match field.
You can use set field to set the match field to the value of the match field and this will trigger a relookup of just the current record.
Hi Phil! Thanks for your quick response.
Can you please explain it in a different way? I don't quite understand what you said.
Is the match field ModelID? Do I change match fields in manage database relationships? If I change it will it change the way my portals work?
Thank you Phil! I finally figured out what you meant and was able to make it work.