Hi  We have recently upgraded Apache Nifi from 1.9.2 to 1.11.4 After the upgrade for any processor if try to right click and view data provenance we are getting the following error     Format version is not supported (resource BufferedChecksumIndexInput(MMapIndexInput(path="/opt/nifi/flow/provenance_repository/index-1562239673000/segments_3po3"))): 3 (needs to be between 7 and 9). This version of Lucene only supports indexes created with release 6.0 and later.     Also we are unable to empty any queue even after stopping the upstream and downstream processors. It keeps showing Dropping flowfiles from queue and is stuck at zero percent.   Currently we are using nifi's own embedded zookeeper in a test environment since we do not have an external zookeeper with 3.5 version yet   Can anyone let me know what these errors mean and how they can be resolved.   ... View more