Update PostConfigImportHook.php

Closes #3479885

src/Drush/Commands/PostConfigImportHook.php

@@ -52,9 +52,9 @@ class PostConfigImportHook extends DrushCommands {
       return;
     }
     $this->addCommand("cohesion:import");
-    $this->addCommand("sitestudio:package:import");
     $isSiteStudioUpgraded = $this->siteStudioConfigService->isSiteStudioUpgraded();
     if ($isSiteStudioUpgraded) {
+      $this->addCommand("sitestudio:package:import");
       $this->addCommand("cohesion:rebuild");
     }
     if ($this->execute() && $isSiteStudioUpgraded) {