Issue Summary

If you access the "fields" in a classic project setting, you will see the custom field from a next-gen project. If you click to edit the fields, the next-gen custom field doesn't appear.

Steps to Reproduce

1. Access a classic project;
2. Go to the project settings;
3. In the left, click on "Fields";
   

Expected Results

The custom field of a next-gen project shouldn't be visible in the classic project settings.

Actual Results

It is displaying a next-gen custom field in the classic project settings.

Workaround

Currently, there is no known workaround for this behavior. A workaround will be added here when available