feat: deactivate instead of delete a link type

program/views.py

@@ -886,6 +886,17 @@ class APILinkTypeViewSet(viewsets.ModelViewSet):
     queryset = LinkType.objects.all()
     serializer_class = LinkTypeSerializer
 
+    def destroy(self, request, *args, **kwargs):
+        """Destroying a link type just makes is inactive.
+
+        This is needed to preserve all the links that reference a link type."""
+
+        link_type = self.get_object()
+        link_type.is_active = False
+        link_type.save()
+
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
 
 @extend_schema_view(
     create=extend_schema(summary="Create a new license type."),