Two different Russia 10 roubles...same Y number

2011 10 roubles. One is bimetal. Other isnt. Both have the same Y number. I dont even know which is really which. Can this be fixed?

To prevent such bugs it would be gret to make pop-up small window or something else like " This number already exists !" during modifiction or creation of a coin

Putting links in the posts makes it much easier!

https://en.numista.com/catalogue/pieces27467.html

I don't know where this coin gets his Y# number from. This coin is not in Krause (not in the 2013, 2014, 2015 nor 2016 edition)!

Citeer: "Essor Prof"​https://en.numista.com/catalogue/pieces27467.html
​
​I don't know where this coin gets his Y# number from. This coin is not in Krause (not in the 2013, 2014, 2015 nor 2016 edition)!

​
I couldn't find it either, but it is listed on the Bank of Russia website.

http://www.cbr.ru/eng/bank-notes_coins/Base_of_memorable_coins/ShowCoins.aspx?cat_num=5714-0008

I don't say the coin doesn't exist. I'm just wondering how it gets a Y# number here in Numista when the coin is not listed (yet) in Krause.

My guess is that Krause missed it because there were 10 ruble Yelets coins in two different series in 2011, and whoever added the uncatalogued "Towns of Martial Glory" coin gave it the number of the "Ancient Towns of Russia" Yelets coin by mistake.

Krause misses many coins. Few Czech commemoratives are also missing. It is no big deal I think.

I checked 3 Russian sources and these coins have the same Y# numbers.
I think this is mistake.

I delete number from monometallic coin, because in other catalogs this coin don't have any numbers.