diff --git a/dmp-db-scema/DataManagementPlanDB.sql b/dmp-db-scema/DataManagementPlanDB.sql
index 2168050f7..5d46d5259 100644
--- a/dmp-db-scema/DataManagementPlanDB.sql
+++ b/dmp-db-scema/DataManagementPlanDB.sql
@@ -102,7 +102,7 @@ COMMENT ON COLUMN "DMPResearcher"."Role" IS 'Enumerator of roles';
 CREATE TABLE "Dataset" (
     "ID" uuid  DEFAULT uuid_generate_v4() NOT NULL,
     "Label" character varying(250) NOT NULL,
-    "DMP" uuid NOT NULL,
+    "DMP" uuid,
     "Uri" character varying(250),
     "Properties" xml,
     "Profile" uuid