How to deal with other user's Vault Names

When a user confirms to be a lockee for a vault, the user agrees to a vault by its name _(not it's ID, maybe we should show the ID?)_. This is confusing because the user might mistake the name for their own vault name _(by default, all users have a "My Password" vault)_ Now if the user changes the name of a vault the request becomes even more confusing as I am not sure what to show to the user:

1. The name of the vault as the other user has it set now
2. The name of the vault at the time when the unlockee-request was sent
3. A display that notifies the user that the vault name has changed from to inbetween.

In any case I am not sure how to deal with it.