How can i change my hair toner?

A couple months ago i bleached my hair and used Wella princess blonde toner. I was happy with the color originally but i would really like to change my toner now to Wella ivory lady. Since Princess blonde is a darker shade of blonde should i try to strip the original toner out with a clarifying shampoo or maybe do a soap/ bleach cap? Or since its been a while since i put the original toner in can i just go over it with ivory lady??