Circulation rule holdallowed set to not_allowed results in warning when browsing a biblio record : > No method count found for Koha::Items > DBIx::Class::SQLMaker::ClassicExtensions::puke(): Fatal: NULL-within-IN not > implemented: The upcoming SQL::Abstract::Classic 2.0 will emit the logically > correct SQL instead of raising this exception. at /home/koha/src/bin/../Koha/ > Objects.pm line 587 from C4/items.pm > 64 my @hold_not_allowed_itypes = Koha::CirculationRules->search( > 65 { > 66 rule_name => 'holdallowed', > 67 branchcode => undef, > 68 categorycode => undef, > 69 rule_value => 'not_allowed', > 70 } > 71 )->get_column('itemtype'); This results in pushing undef in an array and searching "not in" in that array, which is forbidden.