extensions/templates/extensions/version_list.html

@@ -103,11 +103,15 @@
                 <a href="{{ version.update_url }}" class="btn">
                   <i class="i-edit"></i><span>Edit</span>
                 </a>
+                {% with cannot_be_deleted_reasons=version.cannot_be_deleted_reasons %}
+                  {% if not cannot_be_deleted_reasons %}
                     <a href="{{ version.get_delete_url }}" class="btn btn-danger">
                       <i class="i-trash"></i>
                       <span>{% trans "Delete Version" %}</span>
                     </a>
                   {% endif %}
+                {% endwith %}
+                {% endif %}
               </div>
             </div>
           </div>

extensions/views/manage.py

@@ -193,6 +193,7 @@ class DeleteExtensionView(
 class VersionDeleteView(
     LoginRequiredMixin,
     MaintainedExtensionMixin,
+    UserPassesTestMixin,
     DeleteView,
 ):
     model = Version
@@ -232,6 +233,14 @@ class VersionDeleteView(
         context['confirm_url'] = version.get_delete_url()
         return context
 
+    def test_func(self) -> bool:
+        obj = self.get_object()
+        # Unless this version cannot be deleted anymore
+        cannot_be_deleted_reasons = obj.cannot_be_deleted_reasons
+        if len(cannot_be_deleted_reasons) > 0:
+            return False
+        return True
+
 
 class ManageVersionsView(
     LoginRequiredMixin,