Knowledge Base

Different action in IIS fail: Cannot add duplicate collection entry of type ‘name’ with unique key attribute set to ‘name’

Symptoms

Changing the handler (ASP status, PHP version, etc.) in the domain settings Home > Domains > example.com fails with the following error message:

Error: Cannot add duplicate collection entry of type ‘add’ with unique key attribute ‘name’ set to ‘ASPClassic’
Unable to access IIS settings for domain in Home > Domains > example.com.:

external error: Filename: ?C:Windowssystem32inetsrvconfigapplicationHost.config
Line number: 182673 Error: Cannot add duplicate collection entry of type ‘mimeMap’ with unique key attribute ‘fileExtension’ set to ‘.woff’
In module Exception type:System.Runtime.InteropServices.COMException at Microsoft.Web.Administration.Interop.AppHostWritableAdminManager.GetAdminSection(String bstrSectionName, String bstrSectionPath) at
…
at execute “C:Program Files (x86)ParallelsPleskadminbin64websrvmng.exe” –get-mime-types “–vhost-name=example.com” “–vdir-name=/”(vconsoleapp::run line 117)
Error code 1)
Error Code 0x800700b7
Config Error Cannot add duplicate collection entry of type
example.com fails to be open with:

500 external server error
IIS > Sites > example.com > ISAPI Filters fails with:

Cannot add duplicate collection entry of type ‘filter’ with unique key attribute ‘name’ set to ‘ISAPI_Rewrite_32’

Cause

IIS detects a duplicate entry for the same setting at a higher level in the configuration.

Resolution

Log in to the server via RDP
Open IIS Manager and remove the domain IIS > Sites > example.com

Note: It will delete only IIS configuration of the website and left web content intact
Re-create website configuration in IIS by runnig the following command in Command Prompt (cmd.exe):

%plesk_dir%binrepair.exe –reconfigure-web-site -web-site-name example.com

If the steps above do not help, check domain’s web.config file in %plesk_vhosts%example.comhttpdocs folder and remove duplicate entry of the directive from the error message.

If the issue still persists

Review IIS configuration file %windir%system32inetsrvconfigapplicationHost.config and remove duplicate directives from the error for the domain as below:

Back up the current IIS configuration using the following command in cmd.exe :

%windir%system32inetsrvappcmd.exe add backup “My Backup Name”
Open the file %windir%system32inetsrvconfigapplicationHost.config in a text editor and find the section containing the website configuration:

<location path=”example.com”>
Under this section, find <handlers> and remove the string starting with the collection entry name shown in the error:

<add name=”ASPClassic” path=”*.asp” verb=”GET,HEAD,POST,TRACE” modules=”IsapiModule” scriptProcessor=”C:WindowsSystem32inetsrvasp.dll” resourceType=”Either” />
Save the changes made in the %windir%system32inetsrvconfigapplicationHost.config file and try to perform the failed action again.

Note: If the error occurs again with another attribute ‘name’ , delete it from the <handlers> section using the steps described above.