Error rebuilding solution?

I tried changing the merchanlist.cs on visual studio 2015 from:
{0xaf6, new Tuple<int, CurrencyType>(3, CurrencyType.FortuneTokens)},
to
{0xaf6, new Tuple<int, CurrencyType>(3, CurrencyType.Gold)},

But I get an error saying: ambiguity between CurrencyType.Gold and CurrencyType.Gold and when I try to rebuild client I get error, could not rebuild all. Why is this?

Please Post Exact Code?
And Source?

- - - Updated - - -

ya know it could be that the "FortuneTokens" isnt the exact case sensitive word

Using Fabiano's rotmg source. And "FortuneTokens" is preset into the source. I am trying to change the price in nexus shops to "Gold" instead of tokens. Although I tried changing each line individually and that seems to work...

I get an error when changing all at once