diff --git a/src/App/GeoFeatureGroupExtension.cpp b/src/App/GeoFeatureGroupExtension.cpp
index 9480f0b293..d31aab5390 100644
--- a/src/App/GeoFeatureGroupExtension.cpp
+++ b/src/App/GeoFeatureGroupExtension.cpp
@@ -198,10 +198,11 @@ void GeoFeatureGroupExtension::extensionOnChanged(const Property* p) {
             //would return anyone of it and hence it is possible that we miss an error. We need a custom check
             auto list = obj->getInList();
             for (auto in : list) {
-                if(in->hasExtension(App::GeoFeatureGroupExtension::getExtensionClassTypeId()) &&
-                    in != getExtendedObject()) {
-                    error = true;
-                    corrected.erase(std::remove(corrected.begin(), corrected.end(), obj), corrected.end());
+                if(in->hasExtension(App::GeoFeatureGroupExtension::getExtensionClassTypeId()) && //is GeoFeatureGroup?
+                   in != getExtendedObject() &&                                                  //is a different one?
+                   in->getExtensionByType<App::GeoFeatureGroupExtension>()->hasObject(obj)) {    //is not a non-grouping link?
+                      error = true;
+                      corrected.erase(std::remove(corrected.begin(), corrected.end(), obj), corrected.end());
                 }
             }
         }