Sampling proc. & is not compatible with dynamic modification rule &

What causes this issue?

You cannot use the sampling procedure you entered together with the
dynamic modification rule.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

You can:
assign the sampling procedure to the dynamic modification rule as an
"allowed relationship"
OR
choose a different sampling procedure
OR
change the dynamic modification rule before assigning a sampling
procedure to the characteristic

Error message extract from SAP system. Copyright SAP SE.