Thanks for the reply Matt. I tried this, but that tool isn't licensed for my basic license. What seemed to work for me is doing the transformation like Dan Patterson suggested. When I added another polygon feature class (from my ArcMap geodatabase), I had the same problem, so I exported all of the feature classes from my ArcMap geodatabase to where the geodatabase for ArcGIS Pro is stored on my computer (the default place that the software chooses when installing). I'm hoping this solved the problem for all time, but will be wary in case it happens again. Thanks again.
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