Jan,

Jan <tona_kosmicznego_smiecia@interia.pl> writes:

> On Thu, 10 Oct 2019 20:13:45 +0200
> Marius Bakke <mbakke@fastmail.com> wrote:
>
>> This had nothing to do with your local checkout: it happened to
>> everyone who tried to 'guix pull' between commits 6c50e1dc0 and
>> 2d821e4c7.
>> 
>> Sorry for the breakage!  If you rebase your branch, it should work :-)
>
> Hello, I'm affected by this too and have no clue how to fix it.
> Can't switch to previous generations. Could you please tell me how to
> get it to work again please (I'm a relatively new Guix user)?

Just 'guix pull' should be sufficient.

If that does not work, can you paste the error you are getting?