[gentoo-user] sync fails : ERROR:root:OpenPGP verification failed

[Helmut Jarausch]

Hi,

I cannot run emerge --sync
I always get

ERROR:root:OpenPGP verification failed:
gpg: Signature made Fri 02 Feb 2018 09:38:18 AM UTC
gpg:                using RSA key  
E1D6ABB63BFCFB4BA02FDF1CEC590EEAC9189250
gpg: Can't check signature: No public key


What might have been happened?

Many thanks for a hint,
Helmut