Tried to grant some privileges to an user, but it failed with ORA-01711.
SQL> grant create session, create session to erpapp;
grant create session, create session to erpapp
ERROR at line 1:
ORA-01711: duplicate privilege listed
ORA-01711 means that there's a duplicated object in the privilege list, you have to identify it then remove or replace with a valid one.
In this case, we correct the privilege list like this:
SQL> grant create session, alter session to erpapp;
There're more examples to grant privileges correctly, you may have a look.