Connection to MQTT server fails after importing flows

Problem

When copying mqtt-in flows from old Node-RED flow (weaving_DCCAachen) the input nodes can’t connect. The root cause is that there is an old MQTT server still preselected (”ia_mosquitto”)

Solution

Change the server to united-manufacturing-hub-vernemq:1883

If it does not exist yet, create a new one (in newer versions you do not have to specify “ia_nodered” anymore):