We have tried to (manually) copy web sites from one server to a new one (from IIS 7.0 to IIS 8.5). However, a sub-application Default Web Site\ws is throwing the "There is a duplicate 'system.web.extensions/scripting/scriptResourceHandler' section defined" error (referencing a line from the Default Web Site's web.config). What we might have missed?
Default Web Site is running by an app pool configured as .NET 2/Classic.
Default Web Site\ws is running by an app pool configured as .NET 4/Integrated.
Web.config files of both the Default Web Site and the Default Web Site\ws is the same on both servers.
What (configuration) we might have missed to copy/set/transfer?
