From the SWTOR site:
Originally Posted by StephenReidHello everyone,
We will investigate this issue ASAP, although we may not have further details to share before Monday.
I obviously cannot speak on behalf of any retailer, however I would like to let people know who have pre-ordered and redeemed their pre-order code, that their Early Game Access is still secured. You may apply any Game Code from any edition of The Old Republic to your account.
As I said, we'll look into this ASAP and update you when we can.