diff --git a/db/post_migrate/20230803082451_add_unique_index_on_preview_cards_statuses.rb b/db/post_migrate/20230803082451_add_unique_index_on_preview_cards_statuses.rb
index 936d7840eb..c35ad80028 100644
--- a/db/post_migrate/20230803082451_add_unique_index_on_preview_cards_statuses.rb
+++ b/db/post_migrate/20230803082451_add_unique_index_on_preview_cards_statuses.rb
@@ -18,7 +18,7 @@ class AddUniqueIndexOnPreviewCardsStatuses < ActiveRecord::Migration[6.1]
   def deduplicate_and_reindex!
     deduplicate_preview_cards!
 
-    safety_assured { execute 'REINDEX INDEX preview_cards_statuses_pkey' }
+    safety_assured { execute 'REINDEX INDEX CONCURRENTLY preview_cards_statuses_pkey' }
   rescue ActiveRecord::RecordNotUnique
     retry
   end