HTTP Error 500.19 - Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid.

Detailed Error Information:

Module   DefaultDocumentModule
Notification   ExecuteRequestHandler
Handler   StaticFile
Error Code   0x800700b7
Config Error   Cannot add duplicate collection entry of type 'add' with unique key attribute 'value' set to 'welcome.html'
Config File   \\?\C:\inetpub\wwwroot\web.config
Requested URL   http://transatlantic.rorc.org:80/
Physical Path   C:\inetpub\wwwroot
Logon Method   Anonymous
Logon User   Anonymous

Config Source:

    7:                 <add value="welcome.htm" />
    8:                 <add value="welcome.html" />
    9:                 <add value="welcome.cfm" />

More Information:

This error occurs when there is a problem reading the configuration file for the Web server or Web application. In some cases, the event logs may contain more information about what caused this error.

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