civicrm/civicrm-core — pull request #3554 by eileenmcnaughton (2014-06-24 02:21:33+00:00)
Title: CRM-14900 use INSERT ignore for states - this is primarily about copy & ...

...paste protection

(will do 4.5 ones after).
Note the reason for this is that sites legitimately alter their states & countries in between upgrades & it should not be cause for updgrade failure