code_type should not be included

db_scripts/update_v9.sql

@@ -3,4 +3,3 @@ alter table zones alter column id drop default;
 alter table zones alter column id type varchar(100) using id::varchar(100);
 alter table zones alter column code type varchar(100) using code::varchar(100);
 alter table zones alter column zone_type_uri set default 'http://inspire.ec.europa.eu/codeList/ZoneTypeCode/air';
-alter table zones drop column zone_code;
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