Definition &1 is in the customer name range! Create anyway?

What causes this issue?

The name '&V1&' is reserved for cutomers for action manager
definitions. The definition '&V1&' should therefore not be created in
an SAP AG system.

System Response

If you choose <LS>Continue</>, the function will be performed.
If you choose <LS>Cancel</>, the object will not be created.

How to fix this error?

Cancel the function and choose another name for the object that you
want to create.

Error message extract from SAP system. Copyright SAP SE.