YES!
You should never house multiple species together. It's actually recommended that you don't house ball pythons together. They are solitary creatures and easily stressed. There was a thread here not too long ago about an inexperienced keeper keeping a RTB and a ball python with another species of snake (I can't remember if it was another RTB or something else). The ball python got attacked and had to have major surgery and almost died.
There are multiple reasons why you shouldn't house two snakes together, let alone a difference species, and you can find them by using the search function on this forum. You can find pros and cons but mostly cons. Keeping two ball pythons together should only be done by experienced keepers.