reset auto-increment counter before updating entities list

bin/update-metadata.in

@@ -50,6 +50,8 @@ $db->begin_work();
 
 AccountManager::Entity->delete_entities(all => 1);
 
+$db->dbh()->do('ALTER TABLE entities AUTO_INCREMENT = 1');
+
 my %seen;
 foreach my $id (split(/, */, $configuration->{groups}->{list})) {
     my $spec = $configuration->{$id};