Steps to reproduce:
- perform a self registration by specifying 2 groups, 2 aux classes and 2 resources
- submit and perform an approval with admin user
- perform a self management by replacing one group/auxclass/resource with another one
- submbit and perform an approval with admin user
- check the expected result into the administration console ....
Groups, auxclasses and resources assigned to the approved user will be three instead of two.