Make `std::Object` an abstract type.
@@ -329,7 +329,7 @@ CREATE ABSTRACT LINK std::link {
CREATE ABSTRACT PROPERTY std::id EXTENDING std::property;
-CREATE TYPE std::Object {
+CREATE ABSTRACT TYPE std::Object {
CREATE REQUIRED PROPERTY std::id -> std::uuid {
SET default := (SELECT std::uuid_generate_v1mc());
SET cardinality := '11';
