Delivery split due to conflicting header data (&2); no delivery created

What causes this issue?

This item cannot be shipped in the same delivery with other items of the
delivery group &V4& because the header data is different. Field &V2&
contains the value &V3& but in the delivery checked for concatenation
&V2& is &V1&.

System Response

The system issues this message if a delivery split is necessary, but
cannot be done because of the delivery group.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.