Apologies, I missed the title, I only read the body and found no mention of it.
However, I have answered this many times on the forum and have uploaded many print profiles for other people’s models and several of my own that easily resolve this issue.
Take a look at this one with a full explanation, and examples, each of which also explains the situation.
You can open these in Bambbu Studio to see how the model works with the explanation.
It is very easy. You can swap out colours as often as you need as long as you only need a maximum of four per layer.