The current version
of a rule flow is the rule flow that has the highest version number.
It is also the last version that you saved. You can edit only the
latest version of a rule flow.
Only one version of
a rule flow can be unlocked at a time.
When you publish the
current version of a rule flow, that version is locked and assigned
a version number. A new current version is created. You cannot unlock
a rule flow.