We need to always set -Shared (even if we have to set it to $false)

src/Item/Set-CredentialStoreItem.ps1

@@ -83,9 +83,12 @@ function Set-CredentialStoreItem {
         }
 
         # Check if the user passed -Shared. If he added -Shared, we'll pass it into the splatting
-        if ($PSCmdlet.ParameterSetName -eq 'Shared') {
+        if ($PSBoundParameters.ContainsKey('Shared')) {
             $DefaultSplatting.Add('Shared', $true)
         }
+        else {
+            $DefaultSplatting.Add('Shared', $false)
+        }
 
         # Now lets check the given CredentialStore.
         if (-not(Test-CredentialStore @DefaultSplatting)) {