Line item &1 &2 cannot be included in a bundle

What causes this issue?

Document items for which one of the following conditions applies cannot
be included in bundling:
The item has been submitted to a collection agency
A payment order has been generated for the item
The item is relevant for withholding tax
The item has already been included in an installment plan, a collective
bill, or grouped together with other items in a bundle.
The item itself is a collective bill item or an installment plan item.

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?

Deselect the item in question.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.