RTIR Constituency - couldn't load custom field by identifier

Hey there,

I have an issue with one of the custom fields, RTIR Constituency. Server throws these warnings upon interacting (opening, editing) with tickets in any of the queues:

[warning]: Couldn't load custom field by 'RTIR Constituency' identifier (/opt/rt5/sbin/../lib/RT/Record.pm:2321)

which is:

2312 sub CustomFieldValues {
2313     my $self  = shift;
2314     my $field = shift;
2315
2316     if ( $field ) {
2317         my $cf = $self->LoadCustomFieldByIdentifier( $field );
2318
2319         # we were asked to search on a custom field we couldn't find
2320         unless ( $cf->id ) {
2321             $RT::Logger->warning("Couldn't load custom field by '$field' identifier");
2322             return RT::ObjectCustomFieldValues->new( $self->CurrentUser );
2323         }
2324         return ( $cf->ValuesForObject($self) );
2325     }

Field itself is disabled, rights inspector show 0 uses for the field, scrips related to constituency are also disabled.

It is in the database and it has an id assigned to it (2).

I am a bit lost, it appears that I have looked everywhere and what is puzzling the most is the fact that even after disabling the field it still throws these errors.