diff --git a/db/structure.sql b/db/structure.sql
index 7a48a2a7b..265b5157a 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -3275,14 +3275,6 @@ ALTER TABLE ONLY registrars
     ADD CONSTRAINT unique_reference_no UNIQUE (reference_no);
 
 
---
--- Name: unique_reg_no; Type: CONSTRAINT; Schema: public; Owner: -; Tablespace:
---
-
-ALTER TABLE ONLY registrars
-    ADD CONSTRAINT unique_reg_no UNIQUE (reg_no);
-
-
 --
 -- Name: unique_session_id; Type: CONSTRAINT; Schema: public; Owner: -; Tablespace: 
 --