No secret key after rsync

[Niels Kobschätzki]

Hi,

I rsyncd my .gnupg-folder to a new computer (moving from Fedora to TrueOS). When I try to decrypt now something I get the message "no secret key available". 
But when I do gpg -K all my secret keys get listed and when I do gpg -k all public keys are listed. gpg is a symlink to gpg2 on that system. 
My old installation used gpg2. What could be the problem?

Cheers,

Niels