You must enter CWType for &

What causes this issue?

There is an entry in the <LS>OWType</> field (original wage type), but
the <LS>CWType</> field (customizing wage type) is empty.

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?

Please enter a name for the customizing wage type in the <LS>CWType</>
field.

Error message extract from SAP system. Copyright SAP SE.