I had launched the ec2 instance where i have installed redis, and added some data in it. and then after that i wanted to migrate that cache from ec2 redis to aws elasticcache cluster, so for that i created the cluster in aws and started migration, but first time i enabled the encryption in data at rest and encryption in transit data, so it was showing that the migration cannot be happen. But when i created another cluster by disabling the in transit and data at rest encryption, it got migrated. So i wanted to know why is this? and How to migrate the data by encrypting?