SAP Message WRF_AT123 - Order &1 contains changes that will not be synchronized

Diagnosis
There are changes in purchase order &V1& that will not be synchronizedwith the allocation table (allocation table &V2&, item &V3&).
The following changes are taken into account during synchronizationbetween purchase order and allocation table:
Allocation table relevancy indicator
Quantities and units of measure
Distribution center
Delivery phases
Deletion indicator

Procedure
Check purchase order &V1& and the affected allocation table &V2&, itemV3, and synchronize them manually.