@NeheikeQ  yes, newer version of 1.x NiFi-Registry will support older versions of NiFi version controlling to it. For NiFi after upgrade, load the flow.xml.gz on one node and start it.  Then start the other nodes so that they all inherit the flow from the one node where you had a flow.xml.gz.   At this point all nodes should join successfully and will have the same dataflow loaded.  Please help our community thrive. If you found any of the suggestions/solutions provided helped you with solving your issue or answering your question, please take a moment to login and click "Accept as Solution" on one or more of them that helped. Thank you, Matt ... View more