During upgrade from SharePoint 2010 to 2013, when we execute the TEST-SPCONTENTDATABASE command, we run into the below exception that says :
"The <Web site> web application is configured with claims authentication mode however the content database you are trying to attach is intended to be used against a windows classic authentication mode. There is an inconsistency between the authentication mode of target web application and the source web application. Ensure that the authentication mode setting in upgraded web application is the same as what you had in previous SharePoint 2010 web application…."
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