Error : A duplicate content type name was found
I was trying to upgrade a database from SP2013 to SP2016 via database attach method, I received an error & the upgrade failed. when I checked the upgrade logs I found following error 11/03/2017 14:41:14.31 powershell (0x19EC) 0x03EC SharePoint Foundation Upgrade SPContentDatabaseSequence a5u5l ERROR Please upgrade sites using SharePoint 2010 experience in database WSS_Content_SPIN2013 to SharePoint 2013 before proceeding. ff47299e-3cac-d0a6-189a-7b63171d484c 11/03/2017 14:41:15.00 powershell (0x19EC) 0x03EC SharePoint Foundation Upgrade SPUpgradeSe...