How to manage Oracle users by the PUC pentaho 5.0.1

I have configured the pentaho biserver to use with Oracle database. When I validate in PUC page with the admin user registered in my Oracle table USERS I can´t create new users by the administration console in pentaho 5.0.1.

This is the error:
The RuntimeException could not be mapped to a response, re-throwing to the HTTP container org.pentaho.platform.api.engine.security.userroledao.UncategorizedUserRoleDaoException: Error creating user. cause: [ Repository access exception; nested exception is javax.jcr.security.AccessControlException: Principal pruebas-/pentaho/tenant0 does not exist. ]
at org.pentaho.platform.security.userroledao.jackrabbit.JcrUserRoleDao.createUser(JcrUserRoleDao.java:127)...
....


Somebody knows if I can't use the administration console to manage users and roles if I am using Oracle users?



Thanks in advance.