После обновления Cobalt, теперь отображаются все поля по две штуки

Hello COBALT, known issue. Please, see Sergey's first comment in my similar topic:

• Update install issue - Duplicated files and fields

Hello pepperstreet, i have custom templates for fields.

Not sure what to advice. Some thoughts:

• If you can identify which fields in the manager are the unwanted duplicates... just remove those.
• If you want to delete/re-install all fields like me, make sure you BACKUP all custom field templates beforehand. Move them back afterwards.

In any case, make backups!
Or try any steps on a backup first.

It is possible to determine an old component by ID?

COBALT It is possible to determine an old component by ID?

Probably, I guess there must be a reference in the respective DB table that is used by the extension manager.

Also hence the extension ID column in your screenshot. The duplicates differ in almost 100. I assume, that all higher ID's belong to the last installation. And the lower ones are older.

You might test with 1 field only. Uninstall the older one with lower ID. Does it have any effect on your section/type?

Has removed with older ID, has received the message:

Superfluous has disappeared, now everything is all right :)