problem with 50 Tenge Kazakhstan

In the Numista catalogue we have one record corresponding to the code kM 27

https://en.numista.com/catalogue/pieces5856.html

I have one coin with the year 2000 and in my private catalogue has the code KM 27.1 (I cannot why and when I put such code)
Now I have a new coin of the year 2017 and it seems different from the one of 2000, for the colour, the newest is more similar to the colour of aluminium
Now I have seen that other collaborative catalogue report a different coin for the years 2016-2018

Could someone help me to decide if the 2017 coin is really different, and in this case could someone correct our catalogue?

Thanks in advance

All of the circulation issues changed in 2016, that is noted in https://en.numista.com/catalogue/pieces5856.html by the comment "changed coat of arms" for 2016.

I haven't heard anything about a metal change. Could you post pictures along with the weight and diameter?