Instruction, "applying the 6.2.1 patch to a Fabric container"[1], does not have a command to update the default version to create a new container.
===
fabric:version-set-default 1.1
===
So whenever use creates a new container after upgrading to 6.2.1 environment, user need to specify 1.1 to point out the 6.2.1 environment.(default version still points to 6.2.0 environment)

[1]
https://access.redhat.com/documentation/en-US/Red_Hat_JBoss_Fuse/6.2.1/html/Migration_Guide/ESBMigrationPatching-Fabric.html