How can I change (remove) a Seahorse password

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http://askubuntu.com – I installed Ubuntu 12.10 and entered a password in SeaHorse. I would like to remove the password of "Default" but i get this error : GDBus.Error:org.freedesktop.Secret.Error.NoSuchObject: The collection does not exist Is there a fix or a way to bypass modify the password ? Thank you :) (HowTos)