Unable to load widget for Module - Delete custom field

Question

Hi Guys, 
 I am trying to delete a custom relate field but I am getting this error below . do you know why this could happen?

Rodrigo Manara · Accepted Answer

HI All, 
 
 If you ever get into this issue, there is a table in sugar where the field is saved, table name is fields_meta_data , there you should check for the column EXT3, if should have the field name ref although if is empty , this is why the error happen in Sugar. 
 Add the ref field into it and save it. Now you should be able to delete the field via Studio with no problem.