A mistery from PNG? [解決]

I recently bought in a shop this 5 Kiva banknote from Papua new Guinea.
As you can see the signatures are identical to the commemorative version "25 years of the kina" but in my case the black flag of the country that you can see in the right lower part of the front is absent. Moreover in my version serial numbers are letter-letter-number-number.
Also commemorative variants P#22 (Silver jubilee of PNG) and P# A27 (30th anniversary bank of PNG) the same signatures but they have some badges in the lower right that in my banknote are missing.
Can anyone help me?
Thank you very much.

Marco

P-2,6,13,14,19,20,22,27,34 are all very similar. Look at all of them to determine the correct one.
https://en.numista.com/catalogue/note206416.html

The note has the signatures of Leonard Wilson Kamit und Koiari Tarata, which is "P# 13d, Signature 10" in the date line comments.