From d0c3934dde7ed1da3541aab861fc028cb9d9621c Mon Sep 17 00:00:00 2001
From: rudolfkoenig <>
Date: Wed, 5 Jan 2022 12:35:05 +0000
Subject: [PATCH] 10_MQTT2_DEVICE.pm: fixing UNDEFINED for broken clientId
 (Forum #125159)

git-svn-id: https://svn.fhem.de/fhem/trunk@25422 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/FHEM/10_MQTT2_DEVICE.pm | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fhem/FHEM/10_MQTT2_DEVICE.pm b/fhem/FHEM/10_MQTT2_DEVICE.pm
index 412cf3276..48b911ba4 100644
--- a/fhem/FHEM/10_MQTT2_DEVICE.pm
+++ b/fhem/FHEM/10_MQTT2_DEVICE.pm
@@ -285,8 +285,9 @@ MQTT2_DEVICE_Parse($$)
     my $cidArr = $modules{MQTT2_DEVICE}{defptr}{cid}{$newCid};
     if(!$cidArr || !int(@{$cidArr})) {
       my $devName = $newCid;
-      $devName = makeDeviceName($devName);
-      return "UNDEFINED MQTT2_$devName MQTT2_DEVICE $newCid ".$iodev->{NAME};
+      $devName = makeDeviceName("MQTT2_$devName");
+      return "UNDEFINED $devName MQTT2_DEVICE $newCid ".$iodev->{NAME}
+        if(!$defs{$devName}); # 125159
     }
     return "";
   }