Subsequent debit/credit not allowed before invoice posting

What causes this issue?

You are entering an invoice as a subsequent debit/credit. This is not
allowed, because no invoice has been posted for this invoice item yet.

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?

Deselect the subsequent debit/credit indicator.

Error message extract from SAP system. Copyright SAP SE.