The custom field database model has changed in Netbox 2.7.
Therefore the initializer code, that was used before, broke.
As a user, you will need to update your custom_fields.yml file as
follows:
- type must be lowercase
- the `selection` type was changed to `select`
- the filter_logic must be lower case
This is to achieve compatibility with the naming schema that
Netbox uses internally. It allows us to become forward compatible
in case Netbox ever introduces a new type for custom fields.
See the diff of this commit for further information how this is meant.
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