diff --git a/src/Controller/OrganisationController.php b/src/Controller/OrganisationController.php
index 733e284..525c9de 100644
--- a/src/Controller/OrganisationController.php
+++ b/src/Controller/OrganisationController.php
@@ -381,7 +381,7 @@ class OrganisationController extends SimpleController
 
             $source->beforeMerge($target, ['currentUser' => $currentUser]);
 
-            $source->delete();
+            $source->delete(true);
             unset($source);
 
             // Create activity record