Exchange partner changed (old: &,new: &)

What causes this issue?

QS information (breakdown and split indicators) differ between the
exchange header and the newly assigned document item data. This
information should be consistent, please adjust manually.

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?

Go to Qty.schedule maintenance, before leaving QS a popup will be
displayed asking if you wish to set QS data equal to document item
data; <DS:TRAN.O3A3>display exchange agreement</>.


&REFERENCE&
<DS:DE.OIA_EXGPTR>Exchange partner</>

Error message extract from SAP system. Copyright SAP SE.