Active Record - Where filter with same keys

Hi team, I'm having an issue when trying to build a where filter with same keys. Example

PHP Code:

$where = array(
     "state <>" => "foo", 
     "state <>" => "bar",
); 


In the example the query build like "WHERE state <> 'bar'" because of the first element of the array is overridden by the sencond one.

Any solution?

Thanks in advance!