diff --git a/dbAccess/cif.go b/dbAccess/cif.go
index 3b15a1a..0fcf37d 100644
--- a/dbAccess/cif.go
+++ b/dbAccess/cif.go
@@ -182,6 +182,7 @@ func CreateTimetableIndexes() error {
 			},
 			Options: options.Index().SetName("find_by_headcode"),
 		},
+		// Add index for VSTP to allow deletion of non-VSTP only entries
 	}
 
 	_, err := coll.Indexes().CreateMany(context.Background(), indexModels)