weizhouapache commented on code in PR #609:
URL: 
https://github.com/apache/cloudstack-documentation/pull/609#discussion_r2614656718


##########
source/upgrading/index.rst:
##########
@@ -34,6 +34,15 @@ The `cloudstack-management` package will now include the 
systemVM Templates for
 either prior upgrade or during fresh installation, ACS will handle the 
Template registration automatically, by mounting the secondary store onto the
 management server, copying the respective Templates to the store and then 
creating the `template.properties` file.
 
+From ACS 4.20.3 and 4.22.1 onwards A starting MS that detects an
+upgrade is needed but also sees mshost entries for MSses that are up,
+will abort. If as an operator starting an MS you get the error
+`Database upgrade is required but the management server is running in
+a clustered environment.` during upgrade, check if you have stopped
+all MSses in your environment and retry. If is still fails it might be
+that an MS has stopped un-gracefully and you need to fix the DB-entry

Review Comment:
   add an example how to fix in db ?
   
   



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