Mushrooms in WTF enclosure

[XmusJaxonFlaxonWaxon]

So I recently has some mushrooms sprout up in my whites tree frog enclosure, and I dug them out and disposed of them. Today, i found another small one in their cage. Are these harmful? If not, can I keep them in the cage? And if so, what can I do to stop them? This has never happened in my years of experience with these guys, so is there anything I can do? Thanks!
Here's the mushroom:

[Mentat]

You can't get rid of any fungi by pulling out the "mushroom cap." That is just the reproductive body of a spread out organism that is living of organic matter in enclosure. Don't think will hurt your frogs, and will probably go away by itself once the organic matter they feed off is gone.

One thing would check is the enclosure humidity level and that there is no waterlogged soil in enclosure. Lowering humidity might be all you need to do to make any fungi go away .