Hello,
I am sorry but there is no way. It says when you want to fuse it what gets the exp after the fuse.

While I now know how the fuse works and have never made a mistake, it is NEVER clearly explained. (one would assume that if you drag A onto B, then B will eat A, which is true for most cases, but rarity is supreme, which is NOT explained)

And who read the pop up? You know the story of the boy who cry wolf? Yeah, that's how the fuse is, every single fuse, even insignificant ones, requires confirmation, over time, people have stopped paying attention to it. And frankly, the thing is in very bad grammar, took me a while to understand what it's actually saying the first time I read it (specifically the direction of the fuse which is the important bit)

If you want to blame stuff on the player, you have to design a better system first.

Learn to lock the important chakras. Sometimes I made the same mistake but since both chakra rune are locked, nothing happened.

This is really the first time i ever tried feeding an orange chakra since i was hoarding them..never expected it to eat the purple.. I got excited i actually got my initiative chakra after saving.. i wanted to just level it up fast with the previous chakra I had thats leveled up.. Theres no help screen that explains how it works either in the Eight gates panel.. its an unfortunate mistake.. but For 20000 points around 70 millionish coins.. I get top 3 every time in ninetails in server 2 and the winnings alone is only about 1 million coins since there are alot of strong players and it dies within 10 min or less... that's a dire mistake that is hard to learn from..