Anyway remove the gender selected? not selected any !!!! delete something in database?
have a easy way have one more option of "none" for gender?
if too complicate then forget it
PLG_FIELDS_GENDER_SELECT_CUSTOM
no result for gender at all
// Replace #__ to your current table prefix
SELECT * FROM `#__social_fields` ORDER BY `id` ASC
// Replace #__ to your current table prefix
// Replace 10 to your id what you found from your first step
select * from `#__social_fields_data` where `field_id` = 10 and `type` = 'user';
// Replace #__ to your current table prefix
// Replace 10 to your id what you found from your first step
delete from `#__social_fields_data` where `field_id` = 10 and `type` = 'user';
select * from `#__social_fields_data` where `field_id` = 10 and `type` = 'user';
SELECT * FROM `#__social_fields_data` where `uid` = useridhere;