kenmore agitator removal - bolt turns but won't come out

i’m trying to remove the agitator on a kenmore washer.

i’m able to turn the bolt (i have to hold the lower portion of the agitator) but i guess something is stripped cause it never loosens.

any tips on how i can get it out?

thanks!

Wow, never had that and don’t have a good solution. Hopefully someone else does who posts on this Forum.