When you add a new password, it is normally added to the default keyring. If you want to add it to a different keyring, you can choose another one while adding the new password, but you can also change the default keyring. The default keyring is normally the Login keyring.
Select your choice for the default keyring from the list of keyrings under Passwords on the left side panel.
Right click on the selected keyring and select Set as default.
Passwords to some GNOME applications are stored automatically by Passwords and Keys in the Login keyring because it is the default keyring. When you change the default keyring, any new passwords created for GNOME applications will be stored in the new default keyring while GNOME application passwords created before the change will remain in the Login keyring.
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