New line items have resulted

What causes this issue?

New document lines may have been created for the following reasons:
A proration took place during the interval you selected. Prorations can
be caused by:
Changes in the VAT rate
Price changes
Changes in the franchise fee
Price adjustment clauses
The price you selected contains a <DS:TX.ISU_ZONUNG>blocking</>
The franchise fees you selected contain a blocking

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?

Check the generated lines.

Error message extract from SAP system. Copyright SAP SE.