diff --git a/migration/20.03/2003.sql b/migration/20.03/2003.sql
index 5163f720fbadd165e0ed59b560b914075b5c085c..6f88a748da7ebcb9427215fed90c6b3814e8daec 100644
--- a/migration/20.03/2003.sql
+++ b/migration/20.03/2003.sql
@@ -250,6 +250,8 @@ DO $$ BEGIN
       ALTER TABLE tags DROP COLUMN IF EXISTS usage;
       ALTER TABLE tags ADD COLUMN usage TEXT;
 
+      ALTER TABLE tags ADD CONSTRAINT tags_id_pkey PRIMARY KEY (id);
+
       DROP TABLE IF EXISTS resources_tags;
       ALTER TABLE tag_res ADD COLUMN id serial NOT NULL;
       ALTER TABLE tag_res RENAME TO resources_tags;