UBB.threads PHP Forum Software Community Forums UBB.threads Version 7/8 Support Database error when adding emoji character

It looks like I should change Post Body, Post Default Body, and Post Subject from utf8_general_ci to utf8mb4_general_ci. When I tried to do that it complained that it cannot be part of FULLTEXT index. I supposed what I need to do is drop the index, then change the collation, then add the index back. What I don't know is if there are any affects this will have on existing data or functionality.