Cron errors since server change

I recently switched servers AND upgraded my drupal dist. from 4.6.4 to 4.6.5 nearly simultaneously. Since then, I've been getting CRON error messages like the ones below sent to me nearly every hour (how often crontab is set for).

<code>user error: Duplicate entry 'ping_cron_last' for key 1
query: INSERT INTO variable (name, value) VALUES ('ping_cron_last', 'i:1135359845;') in /home/toddalbe/public_html/includes/database.mysql.inc on line 66.

<code>user error: Duplicate entry 'cron_busy' for key 1
query: INSERT INTO variable (name, value) VALUES ('cron_busy', 'b:1;') in /home/toddalbe/public_html/includes/database.mysql.inc on line 66.

<code>user error: Duplicate entry 'ping_cron_last' for key 1
query: INSERT INTO variable (name, value) VALUES ('ping_cron_last', 'i:1135327442;') in /home/toddalbe/public_html/includes/database.mysql.inc on line 66.

user error: Duplicate entry 'cron_busy' for key 1
query: INSERT INTO variable (name, value) VALUES ('cron_busy', 'b:0;') in /home/toddalbe/public_html/includes/database.mysql.inc on line 66.

I am wondering if this is some conflict with the new distro and some module I have installed, or if it might be that the cron job is running on both servers still. I cannot shut cron off on the old server (yet) since I no longer have cpanel access, yet I cannot yet remove the site from the server, either.

I actually suspect it is not the dual cron issue, as the issue, I think, began before the server move. Anyone encounter similar issues or have any suggestions?

Thanks,
Todd