What do I do about mold on my sourdough starter?
You should be able to just scrape the mold (I suspect due to the honey in the recipe) off and continue as normal providing there was only a little bit of mold on the surface.

If there was quite a lot or you're unsure about it then you could discard most of it then use just a tablespoon or two of the mother to seed another starter. Then if after 1 or 2 'feedings' it smells yeasty and is frothing nicely then it should be perfectly fine to use.