Caracteristic WWVOP (created) x VRTNR

I created th solved post (Thanks, Ajay!!):

field-in-co-pa-by-kedr-transaction

But now my client have a doubt: Why the caract WWVOP works and the caract VRTNR doest works in rule crated in KEDR?

Caract VRTNR

"ABAP Dictionary"

Data Element: VRTNR

Domain: PERNR

Data Type/Lenght: NUMC / 8

Origin table: PAPARTNER

Origin Field: VRTNR

Caract WWVOP

"ABAP Dictionary"

Data Element: RKEG_WWVOP

Domain: CHAR10

Data Type/Lenght: CHAR / 10

Origin table: PAPARTNER

Origin Field: VRTNR

The both are active.

Thank you very much.

GLippmann