Appian Service Backed Record Types

Now,I'm learning Appian Service Backed Record Types following Appian tutorial video and reference links.

・video
www.youtube.com/watch

・link
docs.appian.com/.../Sync_Records_Smart_Service.html
docs.appian.com/.../Sync_Records_Smart_Service.html

I have implemented it as shown in the attached screen, but it is causing an infinite loop.
If anyone knows, please provide the details of how to implement it correctly.