- ($number) = selectfirst_array_query($form, $self->dbh, qq|SELECT $filters{numberfield} FROM defaults|) if !$number;
+ ($number) = selectfirst_array_query($form, $self->dbh, qq|SELECT $filters{numberfield} FROM defaults FOR UPDATE|) if !$number;
+ if ($filters{numberfield} eq 'assemblynumber' and length($number) < 1) {
+ $filters{numberfield} = 'articlenumber';
+ ($number) = selectfirst_array_query($form, $self->dbh, qq|SELECT $filters{numberfield} FROM defaults FOR UPDATE|) if !$number;
+ }