Fix the exception "Item has already been added" (#424)

* Fix the exception "Item has already been added"

Fixes the exception "Item has already been added. Key in dictionary: 'x'  Key being added: 'x'"
For the Plugin Invoke-IcingaCheckDiskHealth and potentially others too.
Related to #327, which has been closed, but is still an issue for us on some machines.

* Update 31-Changelog.md

Updates changelog

---------

Co-authored-by: Lord Hepipud <[email protected]>

Author: BTMichel

doc/31-Changelog.md

@@ -7,11 +7,13 @@ documentation before upgrading to a new release.
 
 Released closed milestones can be found on [GitHub](https://github.com/Icinga/icinga-powershell-plugins/milestones?state=closed).
 
-## 1.13.0 Beta-2 (2024-09-19)
+## 1.13.0 (2025-01-30)
 
 [Issue and PRs](https://github.com/Icinga/icinga-powershell-plugins/milestone/21)
 
-### Enhancements
+### Bugfixes
+
+* [#424](https://github.com/Icinga/icinga-powershell-plugins/pull/424) Fixes exception "Item has already been added" for `Invoke-IcingaCheckDiskHeath`
 
 ### Bugfixes
 

provider/disks/Get-IcingaPhysicalDiskInfo.psm1

@@ -285,7 +285,9 @@ function Global:Get-IcingaPhysicalDiskInfo()
             }
         );
 
-        $PhysicalDiskData.Add($MSFTDiskId, $DiskInfo);
+        if(!$PhysicalDiskData.ContainsKey($MSFTDiskId)) {
+            $PhysicalDiskData.Add($MSFTDiskId, $DiskInfo);
+        }
     }
 
     return $PhysicalDiskData;