How to make the form contain only ONE record with the city of Kyiv, or with any other city where there are many branches?

Here is the existing form: [file]21839[/file] [file]21840[/file] [file]21841[/file] https://ngogarua.1b.app/app/forms/10/edit/ [file]21839[/file] [file]21840[/file] [file]21841[/file] When we choose the printed version, the fields with the delivery address via Nova Poshta become available. [file]21839[/file] [file]21840[/file] [file]21841[/file] These fields are related to the New Mail directory [file]21839[/file] [file]21840[/file] [file]21841[/file] There is a problem with cities that have many branches. [file]21839[/file] [file]21840[/file] [file]21841[/file] For example, when we choose Kyiv, all the records with this city fall out. [file]21839[/file] [file]21840[/file] [file]21841[/file] How to make it so that there is only ONE record with the city of Kyiv, or with any other, where there are many branches? [file]21839[/file] [file]21840[/file] [file]21841[/file] [file]21839[/file] [file]21840[/file] [file]21841[/file] [file]21839[/file] [file]21840[/file] [file]21841[/file] [file]21839[/file] [file]21840[/file] [file]21841[/file]