You cannot enter a dynamic set in this set.

What causes this issue?

You are processing set &V1&. This set is used in either a Report Writer
report or a in a key figure. You want to enter set &V2& in this set.
Set &V2&s is either a dynamic set or contains a dynamic set.
Dynamic sets cannot be used in report columns or in key figures.

How to fix this error?

Enter the name of a set that does not contain a dynamic set.

Error message extract from SAP system. Copyright SAP SE.