QBO Error - "Stale Object Error: You and 'someone else' were working on this at the same time. That 'someone else' finished before you did, so your work was not saved."

Explanation - This sync error happens when the sync sees that the record is open is both QuickBooks and JobNimbus. This should clear the next time the sync runs.

How to fix:

Retry the records and force the sync to run.