3696186 - SPAU identifies obsolete note contains customer-specific solution

After upgrade task is finished, when trying to adjust Obsolete notes in SPAU, view below message:

SAP Note xxx contains a customer-specific solution or a modification recommendation that you have implemented in the source release for thw upgrade. The SAP Note is no longer valid for the target release.

Note: the note number 933761 displayed in above image is just an example. The note number could be different in real situation.

(Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.)

SAP AS ABAP system. 

SPAU, note, adjustment, obsolete note, reset, customer-specific, customer-specific solution, 3rd party, customized, enhancement, modification. , KBA , BC-UPG-NA , Note Assistant , Problem