Might be a bit late, but I had the same problem.
I think this problem might come from the fact that you have several layers referencing the same feature class.
For me, I solved the problem by creating only one layer referencing this feature class with a symbology by category instead. But be careful, I noticed that the "unique values, may fields" is not supported.
Hope it will help.
I encountered the same error when downloading data onto the Collector app. The "several layers referencing the same feature class" solution worked for me, thanks Nicolas!
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