You are not authorized for class type "&"

What causes this issue?

You want to maintain classes or allocations with class type &V1&.
However, you are not authorized to use this class type.

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?

Choose another class type or ask your system manager to authorize you
to use this class type.

Error message extract from SAP system. Copyright SAP SE.