For Contact Form 7 Users: a recent update of the Contact Form 7 plugin seems to have added several new meta fields to form submissions. These automatically get saved by the CFDB plugin. If you look on the Database page in your administration panel, you will see extra fields associated with new submissions:
You may view these fields as unwanted clutter.
To avoid saving these fields, go to the Database Options page, and paste the list of fields in the following:
Since regular expressions can now be used in this field, you can achieve the same effect but putting in this: