I had two mithral ores and used one to forge an item (killed forge guardian). But Now I'm stuck. I put a different mold into the mold receptacle, but the crucible won't take the second piece of ore. The crucible is not interactable at all. I don't think this is intentional.

I saw some Reddit and steam forum discussions of this, but they were confusing because people started talking about how to get the second piece of ore, which I already have. And anyway, no one had a solution that has worked for me. I tried searching the issue here, but this specific issue didn't come up. How can I get the forge crucible to "reset" so it will allow me to use it to craft a second item?

Thanks!