Hello!   Can you kindly help me in an NiFi upgrade error?   I followed this tutorial: https://cwiki.apache.org/confluence/display/NIFI/1.x.0+to+1.x.0+Upgrade   Following it, i stopped my processors, waited until my flows had no queued flowfiles, stopped old nifi services, changed property names to my new nifi version, moved the flow.xml.gz to my new installation and started the services in the new version.   After this, i get the error shown bellow:     Is this a regular mistake? Do you know any alternatives in this case?   Thank you, Lucas     ... View more