diff --git a/db/migrate/20180910155506_add_uniqueness_of_order_id_to_spree_shipments.rb b/db/migrate/20180910155506_add_uniqueness_of_order_id_to_spree_shipments.rb
index 34d509111e..0ee5849afd 100644
--- a/db/migrate/20180910155506_add_uniqueness_of_order_id_to_spree_shipments.rb
+++ b/db/migrate/20180910155506_add_uniqueness_of_order_id_to_spree_shipments.rb
@@ -1,6 +1,9 @@
 # This migration is an OFN specific migration that enforces an order to have a single shipment at all times
 class AddUniquenessOfOrderIdToSpreeShipments < ActiveRecord::Migration
   def change
+    Spree::InventoryUnit.connection.schema_cache.clear!
+    Spree::InventoryUnit.reset_column_information
+
     destroy_all_but_latest_shipments
 
     remove_index :spree_shipments, :order_id