Number of orders with delivery block

Number of orders with delivery block
The orders to be delivered have a delivery block. This means that it is
not possible to create a delivery for an order item or a schedule line.

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?

You should ensure that orders blocked for delivery do not create an
entry in the delivery due index. Note that you can then no longer use
transaction V.14 (display sales orders blocked for delivery).
<DS:SIMG.SIMG_CFMENUOLSDOVB9> Requirements for creating a work list</>
See also <DS:NA.VL876>Remarks on the delivery block at schedule line
level</>

Error message extract from SAP system. Copyright SAP SE.