SharePoint Duplicate Key
In SharePoint 2010 or 2013 it's possible that when try to open "content or structure" on the settings.aspx page or when try to open a list or all lists that you get an error telling you that a duplicate key exists. The duplicate key is related to a list somewhere in the SharePoint site-collection. The issue is at hand is that you won't be able to find it using the GUI. So i thought i would share my powershell script that will check for duplicate lists / keys so that you know which list to remove via disabling a feature or just by removing it with powershell. (will also work with host named site collections) code: Function Get-Duplicate { param($array, [switch]$count) begin { $hash = @{} } process { $array | %{ $hash[$_] = $hash[$_] + 1 } if($count) { $hash.GetEnumerator() | ?{$_.value -gt 1} | %{ New-Object PSObject -Property @{ Value = $_.key Count = $_