Not all business partner items can be transferred

What causes this issue?

Among the selected business partner items are items that are not
permitted for a transfer. Examples of reasons are:
Item was submitted to an external collection agency
Item is part of an active installment plan
Item is part of a collective bill
Credit memo item (see Customizing)
Statistical budget billing request
Statistical disbursement request
Statistical cash security deposit request
Statistical item
Clearing update invoice item
Transfer creates identical item

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

System Response

All permissible business partner items are transferred.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.