I can’t change my date of birth

Hello son I’m trying to change my date of birth on appleid.apple.com website I got this error message says You must be part of a family to make this change. Learn about Family Sharing and Apple IDs for kids. Please change my date of birth to February 06 2008 But my date of birth is February 06 2008 I changed my date of birth let me know what is wrong with Apple ID

i changed my date of birth to February 06 2008

it is 5 o clock

ANTHONY keeps saying how long until 5:10 to me

anthony has a phone

to screen record to me

many thanks

from ANTHONY Jackson