I goofed on a portal geodatabase when I created a new dataset. Created it with a date (all the previous dataset have dates also). Imported the feature classes from the previous month's dataset to use that data to edit in ArcMap (to publish it out as a map service). Added the date to the end of the feature classes to match the dataset name. Well dates then where added to the older feature classes with those dataset dates unbeknownst to me. Trying to change it back to where it was it will not let me. No renaming, can create a