I placed my first order a few moths ago, and created an account on the Budget website.

The login username that the system uses is a person's email address.
I now want to change my email address and the old one will cease to exist soon.

There seems no method to change that within "my account".
I suppose when I place a new order I can create a new one, but any records of past orders stay with the obsolete account.
If wanted, I guess I can log into the old account with the old (obsolete) address just to view it. (don't know why I would though).
Are any problems associated with 2 accounts, having the same name, address, phone number, yet only one has a current valid email address?