Recursive field references are not allowed

What causes this issue?

When defining the local field, you referenced other local fields in
order to transfer attributes from the reference field or when
formulating the calculation formula. One of these local fields is
either itself the field just defined (direct recursion) or it uses the
field just defined within its own definition (indirect recursion).
A local field cannot reference itself within its own definition.

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?

Change the definition of the local field so that no fields refer to
themselves.

Error message extract from SAP system. Copyright SAP SE.