There's a migration that's about to happen for your 1st token. You just have to follow the instruction and swap it with dawn.
It seems what you need to do can be found there. Read the FAQ article and look at each details of what you have to do.
Thank you for your answer, I was told that the swap already occurred and that the nonswapped coins were burned following the decission of the community. After this, the https://claim.dawn.org was updated and no longer allows to swap 1ST to DAWN.
That means that the swap was already expired and there's no way for your coins to be swapped anymore. You just have to accept the reality that it's no longer available and your tokens were completely burned as they've said.
If you will buy some new coins, you have to make sure that you're being updated on it from time to time. Especially, if you've bought it with your very much hard earned money and it's not just a hard fork or airdrop token.