ref $ibx or die "BUG: expected PublicInbox::Inbox object: $ibx";
my $levels = qr/\A(?:full|medium|basic)\z/;
my $inboxdir = $ibx->{inboxdir};
- my $version = $ibx->{version} || 1;
+ my $version = $ibx->version;
my $indexlevel = 'full';
my $altid = $ibx->{altid};
if ($altid) {