diff --git a/twinglecampaign.php b/twinglecampaign.php
index 2e4351a..f80cc3d 100644
--- a/twinglecampaign.php
+++ b/twinglecampaign.php
@@ -130,9 +130,22 @@ function twinglecampaign_postSave_campaign_update_callback(
   if ($campaign_type_id == $twingle_project_campaign_type_id) {
     $entity = 'TwingleProject';
   }
-  else {
+  elseif ($campaign_type_id == $twingle_campaign_campaign_type_id) {
     $entity = 'TwingleCampaign';
   }
+  else {
+    Civi::log()->error(
+      E::SHORT_NAME .
+      " Update of TwingleCampaigns failed: Unknown campaign type (id: $campaign_type_id)"
+    );
+    CRM_Core_Session::setStatus(
+      E::ts('Unknown campaign type'),
+      E::ts('Campaign type id: %1', [1 => $campaign_type_id]),
+      error,
+      [unique => TRUE]
+    );
+    return;
+  }
 
   if (isset($_POST['action'])) {
     if ($_POST['action'] == 'clone' && $entity == 'TwingleProject') {