I'm getting the operation rolled back error and wonder if anyone has found a fix. I don't believe I have any required fields, the track editor features has been turned off, and this fix from another thread didn't help either:
"Here is a work around that should work;
1) in AGOL create a copy of the map that is showing the error - So just open up the map causing the issue and do Save As - MapName-Copy
2) Refresh map gallery in Collector to pull down this new map
3) Open up the MapName-Copy in a connected mode
4) Exit map and go to the map with unsynced edits and tap the sync icon
This should create that username/pwd that you need for syncing the edits back.
Let me know if this works for you
Russ"
Thanks, Jeff