Saving display settings creates user warning - duplicate entry

Hi,

thanks for this great module, really helped me a lot.

There seems to be a bug, when you save the display settings:
(it seems to preserve the new/saved settings, but doesn´t actually show the right settings afterwards.

* user warning: Duplicate entry 'relativity_render_content_business_content_recom' for key 1 query: INSERT INTO variable (name, value) VALUES ('relativity_render_content_business_content_recommendation', 's:5:\"title\";') in /var/www/html/blissity-sandbox/includes/database.mysql.inc on line 121.
* user warning: Duplicate entry 'relativity_render_content_question_content_recom' for key 1 query: INSERT INTO variable (name, value) VALUES ('relativity_render_content_question_content_recommendation', 's:5:\"title\";') in /var/www/html/blissity-sandbox/includes/database.mysql.inc on line 121.
* user warning: Duplicate entry 'relativity_render_content_recommendation_content' for key 1 query: INSERT INTO variable (name, value) VALUES ('relativity_render_content_recommendation_content_business', 's:5:\"title\";') in /var/www/html/blissity-sandbox/includes/database.mysql.inc on line 121.

Would be probably great if someone knows how to fix this.

Thanks

Cheers,
Jochen