Adobe prerelease membership conflict

Hi,

before account split to enterprise and private i was member of few adobeprerelease program. After the split all membership was left on my private account. I was unable to use it because there is no licence on private acc. I have tried to join programs on enterprise acc but i get error of e-mail already in use. I have left all program form private acc and tried to join on enterprise, but i get same error message.
How to rejoin again on enterprise?