pkg / poudriere issue - wrong packagesite / meta

[Grzegorz Junka]

I just finished building ports for FreeBSD 12.1. I have already upgraded 
base to 12.1 and now I am trying to update packages, but pkg fails with 
this cryptic error:

# pkg update
Updating desktop_nvidia repository catalogue...
pkg: repository meta has wrong version 2
pkg: Repository desktop_nvidia load error: meta cannot be loaded No error: 0
Fetching meta.txz: 100%    236 B   0.2kB/s    00:01
pkg: repository meta has wrong version 2
repository desktop_nvidia has no meta file, using default settings
Fetching packagesite.txz: 100%  463 KiB 474.1kB/s    00:01
pkg: repository meta has wrong version 2
pkg: Repository desktop_nvidia load error: meta cannot be loaded No error: 0
Unable to open created repository desktop_nvidia
Unable to update repository desktop_nvidia
Error updating repositories!

There was no error in poudriere, 1067 packages have been built 
successfully, 1 skipped, 3 ignored.

Poudriere version 3.3.2_1

The new repo has meta:

# cat meta.conf
version = 2;
packing_format = "txz";
manifests = "packagesite.yaml";
filesite = "filesite.yaml";
manifests_archive = "packagesite";
filesite_archive = "filesite";

The old repo had meta:

# cat meta
version = 1;
packing_format = "txz";
digest_format = "sha256_base32";
digests = "digests";
manifests = "packagesite.yaml";
filesite = "filesite.yaml";
digests_archive = "digests";
manifests_archive = "packagesite";
filesite_archive = "filesite";

So looks like the meta has changed and the old pkg, which is installed 
on the system, doesn't like it.

How am I supposed to upgrade the pkg and/or database to the new version?