From cc52b6cfd437bb1431f6e646955bdc3a86023fac Mon Sep 17 00:00:00 2001
From: Quincy Morgan <quincy.morgan@icloud.com>
Date: Thu, 18 Jun 2020 10:51:12 -0400
Subject: [PATCH] Prevent empty combo fields from adding a blank tag

---
 modules/ui/fields/combo.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/ui/fields/combo.js b/modules/ui/fields/combo.js
index a76fb3981..04d6ca0d0 100644
--- a/modules/ui/fields/combo.js
+++ b/modules/ui/fields/combo.js
@@ -309,7 +309,7 @@ export function uiFieldCombo(field, context) {
             if (!rawValue && Array.isArray(_tags[field.key])) return;
 
             val = context.cleanTagValue(tagValue(rawValue));
-            t[field.key] = val;
+            t[field.key] = val || undefined;
         }
 
         dispatch.call('change', this, t);