Class type & : class & has no characteristics

What causes this issue?

You want to assign characteristic values to an object in the class.
However, class &V2& of class type &V1& has no characteristics.

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?

Save the allocation of the object to the class without assigning
values.

Error message extract from SAP system. Copyright SAP SE.