The purchase order for the distribution center must be generated first &1

What causes this issue?

You want to create single-store vendor orders for the allocation table
item. In this case, the system only creates issue documents for the
recipient if the vendor orders exist.

System Response

INCLUDE ISR_STOP

How to fix this error?

Create the relevant vendor orders in advance.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.