What happens if i change the management mode?

I need to change the management mode to Android Enterprise. The mode is currently Android Enterprise and Device Admin. After scanning a QR i get the messege that i am in the wrong managment mode. To fix this i want to go to to the management mode Android Enterprise. The problem is all active devices are Device Admin, threfore i would like to know what happens to the active devices when i switch to Android Eterprise only.

to better highlight the problem
[edited by: Keno Renken at 10:05 AM (GMT -7) on 7 Jun 2021]