Update upgrade-from-v0.6.2-to-v0.7.0.md

Signed-off-by: Sheng Yang <sheng.yang@rancher.com>
longhorn · Nov 15, 2019 · fa54123 · fa54123
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commit fa54123
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diff --git a/docs/upgrade-from-v0.6.2-to-v0.7.0.md b/docs/upgrade-from-v0.6.2-to-v0.7.0.md
@@ -4,6 +4,7 @@ The users need to follow this guide to upgrade from v0.6.2 to v0.7.0.
 
 ## Preparation
 
+1. Make sure Kubernetes version >= v1.14.0
 1. Make backups for all the volumes.
 1. Stop the workload using the volumes.
     1. Live upgrade is not supported from v0.6.2 to v0.7.0