Need to modify same device UDID in developer account

Question

I have added UDID in upper case in Developer account.Now its not allowing me to change it or to add the same UDID in lower case by clicking +(add new).I want to know whethe

Answer 1

Sorry, Not possible..U cannot modify it once it is registered. U can modify or delete only at the time of renewal of your developer account. Contact Apple Support Team for further assistance..!

Refer Below Link:

https://forums.developer.apple.com/thread/24340