My first issue report here!

I'm installing a k8s region with a single ubuntu 18.04 node using kud aio.sh script. etcd does not start with following error:
 :59.759059 N | etcdserver/membership: set the initial cluster version to 3.3
:59.759121 C | etcdserver/membership: cluster cannot be downgraded (current version: 3.2.26 is lower than determ process exited, code=exited, status=1/FAILURE
 
I could not find any solution for this etcd problem. Changing kubespray version from v2.10.4 to v2.11.0 works, so I suggest to upgrade kubespray version. Any issue may be caused?