I also Googled the error message, and got taken to this web page: https://http-download.intuit.com/http.intuit/CMO/proseries/resources/user_guide/ty11/Guide-Pro/7%20-... 

However, it looks like the page was written for ProSeries 2008, and most of the suggestions to re-sync or otherwise repair the data bases, aren't options in ProSeries 2020.