From bebd7db2145d4ec07a224e9299f93bb8dcdfc16c Mon Sep 17 00:00:00 2001
From: Quincy Morgan <2046746+quincylvania@users.noreply.github.com>
Date: Fri, 9 Oct 2020 10:24:53 -0400
Subject: [PATCH] Fix potential JavaScript error

---
 modules/actions/upgrade_tags.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/actions/upgrade_tags.js b/modules/actions/upgrade_tags.js
index 6dc13cc73..9760f53df 100644
--- a/modules/actions/upgrade_tags.js
+++ b/modules/actions/upgrade_tags.js
@@ -7,6 +7,7 @@ export function actionUpgradeTags(entityId, oldTags, replaceTags) {
         var semiIndex;
 
         for (var oldTagKey in oldTags) {
+            if (!(oldTagKey in tags)) continue;
             // wildcard match
             if (oldTags[oldTagKey] === '*') {
                 // note the value since we might need to transfer it