apt expired key signature for skype

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error:

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://repo.skype.com/deb stable InRelease: The following signatures were invalid: EXPKEYSIG 1F3045A5DF7587C3 Skype Linux Client Repository <se-um@microsoft.com>

solution:

$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 1F3045A5DF7587C3
Executing: /tmp/apt-key-gpghome.0oMzaHu9jU/gpg.1.sh --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 1F3045A5DF7587C3
gpg: key 1F3045A5DF7587C3: "Skype Linux Client Repository <se-um@microsoft.com>" 3 new signatures
gpg: Total number processed: 1
gpg:         new signatures: 3

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