diff --git a/scripts/migration_timescaledb.sql b/scripts/migration_timescaledb.sql
index 118e58d..85f33c6 100644
--- a/scripts/migration_timescaledb.sql
+++ b/scripts/migration_timescaledb.sql
@@ -57,6 +57,10 @@ ALTER TABLE user_messages2
 ALTER TABLE user_messages2
     ADD CONSTRAINT user_messages2_username_fkey
     FOREIGN KEY (username) REFERENCES "user"(name) MATCH FULL;
+ALTER TABLE public.user_messages2
+    ADD CONSTRAINT user_messages2_user_msg_uniq
+    UNIQUE (username, "timestamp", msg);
+ALTER TABLE public.user_messages2 OWNER TO datanommer;
 
 -- package_messages2
 CREATE TABLE package_messages2 (LIKE package_messages INCLUDING DEFAULTS INCLUDING ALL);
@@ -68,6 +72,10 @@ ALTER TABLE package_messages2
 ALTER TABLE package_messages2
     ADD CONSTRAINT package_messages_package_fkey
     FOREIGN KEY (package) REFERENCES package(name) MATCH FULL;
+ALTER TABLE public.package_messages2
+    ADD CONSTRAINT package_messages2_pkg_msg_uniq
+    UNIQUE (package, "timestamp", msg);
+ALTER TABLE public.package_messages2 OWNER TO datanommer;
 
 -- Convert the timestamp to the hypertable