How to diagnose the «The configuration parameter "formElement" is a required» for a field?

SELECT * FROM `eav_attribute` WHERE 'telephone' = attribute_code;

A similar issue:


DELETE FROM customer_eav_attribute WHERE 165 = attribute_id;
DELETE FROM eav_attribute WHERE 165 = attribute_id;

I had same error.
I had this error with multiple attributes.
I fixed by open attribute from Stores->Attributes->Products and save again.
This helped me, I hope this will help you too.