@@ -, +, @@ --- Koha/CirculationRules.pm | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/Koha/CirculationRules.pm +++ a/Koha/CirculationRules.pm @@ -282,7 +282,7 @@ sub set_rule { my $rule_name = $params->{rule_name}; my $rule_value = $params->{rule_value}; my $can_be_blank = defined $kind_info->{can_be_blank} ? $kind_info->{can_be_blank} : 1; - $rule_value = undef if $rule_value eq "" && !$can_be_blank; + $rule_value = undef if $rule_value && $rule_value eq "" && !$can_be_blank; for my $v ( $branchcode, $categorycode, $itemtype ) { $v = undef if $v and $v eq '*'; --