Transferring to a new PhD program
I doubt that it would have any effect. People learn and change and others recognize that. However, the only way to know is to actually apply, or at least make contact with some of the other universities. 

You will want to be able to explain your reasons, of course, and be pretty sure you aren't making a mistake by changing. 

But you don't have to abandon your current studies to explore other opportunities. Find and contact a professor or two in the new discipline and ask them if you would be a good candidate in their program, or even working under their direction. You could also just make application a few places. 

However, if you are currently funded, and/or other people are depending on your research to complement theirs, you will need to deal with the consequences of that so that you don't put yourself or others at a disadvantage. 

But, as you are early in your studies, I don't really see much of a problem. Just ask at the institutions you are considering.