Default and explicit mastership specification
You can use auto-make-branch rules in config specs only if the current replica masters the branch type in the rule.
By default, when you create an element in a replicated VOB, mastership of the branch main is assigned to the replica that masters the branch type main. If this replica is not your current replica, you cannot create new versions on the main branch. Also, if your config spec contains mkbranch rules and your current replica does not master the branch types, the branches cannot be created during element creation.
For more information about default and explicit mastership specification, see Assigning branch mastership during element creation.