[Assist] Update: PGP key error

[Frédéric Fort]

Hello,

I am unable to update my system for some days now. For one reason or
another, there seems to be a problem with the PGP keys.
I have the following problem:

:: Proceed with installation? [Y/n] Y
(84/84) checking keys in keyring
[####################################################] 100%
downloading required keys...
:: Import PGP key 1024D/, "Fabio Castelli <muflone at vbsimple.net>",
created: 2009-07-04? [Y/n] Y
error: key "Fabio Castelli <muflone at vbsimple.net>" could not be imported
error: required key missing from keyring
error: failed to commit transaction (unexpected error)
Errors occurred, no packages were upgraded.


Does anyone have an idea were the problem is?

Thank you,
Frédéric Fort