Fix “SPUpdatedConcurrencyException” error in SharePoint 2013

Original:  http://www.pbnet.ro/?p=372

Fix the “SPUpdatedConcurrencyException” that appears in the upgrade logs when running PSCONFIG

Posted by pbnet on Wednesday, February 6, 2013 · Leave a Comment
Scenario: You installed upgrade binaries on your  SharePoint 2010 farm and you run the following command to upgrade the farm: psconfig –cmd upgrade –inplace b2b –wait –force. Afterwards, the upgrade fails and you get the following error in the upgrade logs:
Microsoft.SharePoint.Administration.SPUpdatedConcurrencyException was thrown. Additional exception information: An update conflict has occurred, and you must re-try this action.

Solution:
1. run: stsadm -o setproperty -pn command-line-upgrade-running -pv no
2.  perform an IISReset
3. Restart the SharePoint 2010 Timer (OWSTIMER)
4. run the command again: psconfig –cmd upgrade –inplace b2b –wait –force

NOTE: make sure that the other web server is stopped.