diff --git a/server/migrations/20170827182423-improve-references.js b/server/migrations/20170827182423-improve-references.js
index a8bd04df1..788f3b60c 100644
--- a/server/migrations/20170827182423-improve-references.js
+++ b/server/migrations/20170827182423-improve-references.js
@@ -1,6 +1,5 @@
 module.exports = {
   up: async function(queryInterface, Sequelize) {
-    await queryInterface.removeIndex('documents', 'atlasId_foreign_idx');
     await queryInterface.changeColumn('documents', 'atlasId', {
       type: Sequelize.UUID,
       allowNull: true,