Hey, check your first name and last name as well. If there is any mismatch in first name and last name, the transfer won’t be possible.
Example
Amex
First name- James,
Last name-Bond it’s James Bond
In Marriott
First name- Bond
Last name - James it’s Bond James
the name is same but the first name would be last name , the last name would be first name. So mail the Marriott. team. to change the name and share them your any ID proof
To get it, changed soon.
Bonvoy.Program@marriott.com