We have several reports that attempts to update UTMs in HA or Cluster mode prior to this posting, may have encountered issues when updating to UTM 9.111.
Please note, that any updates which have been initiated after this post had been issued will NOT be affected anymore as the issue has been fixed!
The following knowledge base article provides detailed instruction on how to identify if you are affected and how to finish the update successfully:
How to fix issues with the 9.1 update in a HA setup
Eric Bégoc
Senior Product Manager
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