Delivery note item & & is not DTUC-relevant

What causes this issue?

You are processing a delivery note item that has not been flagged as
DTUC-relevant.

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 if the item status has been set to DTUC-relevant on the tab page
<ZK>Status Overview</> in the delivery. To process a batch split item,
the status has to be <ZK>A</>.
There are various reasons why the status might not be set:
Does a batch split item exist for the delivery?
Has a DTUC class been maintained?
Has the DTUC function for the shipping point/DTUC class been activated
in Customizing for <ZK>DTUC</>?
Are there any inconsistencies between existing DTUC-relevant
characteristics?
Has any user exit been activated in the DTUC check that is restricting
the function?

Error message extract from SAP system. Copyright SAP SE.