Ok. You’ve added custom fields in wordpress, but how can you remove them?
How to delete custom fields wordpress
1) open your phpMyAdmim and search in the wp_postmeta table all the records that match your custom field name in the “meta_key” field and delete them. You can do a query like this:
DELETE FROM `wp_postmeta` WHERE meta_key = 'test_field'
Just change “test_field” with the name of the wrong custom field that you want to remove.
2) if you don’t understand sql and phpmyadmin, look out for a plugin that handles custom fields to remove them.