DELETE subsection in Myanmar banknote listing [gelöst]

What does the subsection in Myanmar banknotes of Delete mean?

Look on the first page of Myanmar notes and the box in the upper left. It gives a list of different eras in Mynmar and one of them is Delete.  https://en.numista.com/catalogue/myanmar-banknotes-1.html

One note I have : N#208250 in the features block the Currency label says Delete. What is this ‘Delete’?

I think someone is changing things around. However not sure what happened to first kyat. 

As there is political instability in Myanmar, formerly Burma, there is instability in our organization of periods and issuers within our definitions of Myanmar and Burma. Only thing I can say is Delete is not valid. Why do we not organize this political area similar to how the Banknote Museum does?