Penzu will sometimes create a new journal in your account called “Unclaimed Entries”. This journal is a place to keep entries that haven’t been saved to one of your existing journals yet. This could happen for a variety of reasons but it’s mainly in the event that all of your journals were locked when trying to save an entry to your account.
If you don’t want entries in the “Unclaimed Journal”, simple move them to another unlocked journal by following the instructions found here. You can also delete the “Unclaimed Entries” journal whenever you want.