Changed the main field of leads but not reflected in columns and export

[iz_step]

I have changed the main field of leads from account name to organization name by overriding the method _getName() from /application/Espo/Modules/Crm/Entities/Lead.php and the field name changed in titles.

I did a relation between leads and contacts but leads to any contact showing the ID like the screenshot attached and not the organization name.

Any hint on how to change the main field of the leads everywhere?