Pro-tip:
Whenever you make a poll, always make the last option "Other" or something like that.
I often will make it something cheeky like "Who the heck cares? Get a hobby!"
Its been a while, but I have contacted the entities division at IRS in the past. I don't have the number available, but I believe you fax them with a request to change the PN, with an explanation, and they fix it in their records for multiple years. I had to do it for several clients after the IRS took it upon themselves to change the PN for several of my plans in 2014 or 2015.