Full product is missing for empties item &1 &2 -> System cannot accept

What causes this issue?

You want to post a goods receipt for a purchase order. You are trying
to post an <DS:GLOS.3526BBC5AFAB52B9E10000009B38F974>'empties' material
</>.
In this case the 'empties' material is a tied 'empties' material. You
can only post this type of material along with the corresponding
<DS:GLOS.352A7ADBD3895CD5E10000009B38F974>full product</>.

System Response

The system cannot accept the 'empties' item.

How to fix this error?

Make sure that you post the corresponding full product along with the
'empties' material.

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.