From be243c9aa76d6cf19daf609253cf23445821148a Mon Sep 17 00:00:00 2001
From: nathan <nathangray.bsc+github@gmail.com>
Date: Wed, 15 Nov 2023 11:16:53 -0700
Subject: [PATCH] Calendar: Fix incorrect extra user as participant

---
 calendar/inc/class.calendar_uiforms.inc.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/calendar/inc/class.calendar_uiforms.inc.php b/calendar/inc/class.calendar_uiforms.inc.php
index 3803539eab..decaa5fdf7 100644
--- a/calendar/inc/class.calendar_uiforms.inc.php
+++ b/calendar/inc/class.calendar_uiforms.inc.php
@@ -457,7 +457,8 @@ class calendar_uiforms extends calendar_ui
 						case 'participant':
 							foreach($data as $participant)
 							{
-								if (is_null($participant))
+								// Participant widget returns "" when no value is selected
+								if(is_null($participant) || !trim($participant))
 								{
 									continue;
 								}