Skip certain forms from saving data to database

Hi,

Fantastic plugin thanx!

I’m using Contact Form 7 with CFDB.

Versions:
WP: 4.9.7
CF7: 5.0.3
CFDB: 2.10.29

I would like to skip certain forms from saving the data to the database.
I’m using the cfdb_form_data filter which is working 100%. The only problem is I’m not sure what to return to make sure the plugin will skip saving the data. Currently I’m returning a false value (also tried an empty object) but it still saves the data. When viewing the data, there is a form called ‘Unknown’ with a single column called ‘Submitted’ and value of ’01 Jan 1970′.

Is there another filter I’m missing or what am I doing wrong?

Thanks in advance for your assistance.

Chris