I created a few custom fields for Items in Zoho Sales and would need to update/modify some of them, and to delete others.

However, when i try to delete or to modify settings (such as "Display when creating transactions" from Yes to No), I have the notification that "since the custom field has been used in some transactions, it cannot be deleted" (although for some fields i just try to modify settings of the custom field, not to delete it)...

What to do in that situation?

Thanks in advance