Using my.token in Change Program Member Data New Value

Hi,

Hope everyone is doing well.

I just had a quick question if anyone has come across the scenario.

I am using Change Program Member Data in my Flow step and in new value, I used my.token value. I have created a score type token so I expected it to increment the value each time the member will run through the program. As it is doing for change score in flow step.

However, for Change Program Member Data , it is not working like a score token, is it because it is a string datatype field.

Please find screenshot of flowstep & token :

Any help will be appreciated.

Kind Reagrds,

Vidhi