That is correct, for the “Replace a record” module.
This is because “Update a record” doesn’t allow erasing of values, only adding values to an existing record.
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Did you know, the concepts of about 70% of questions asked on this forum are already covered in the Make Academy. Investing some effort into it will save you lots of time and frustration using Make later!