ORA-01700
Tried to grant a privilege to some users, but it failed with ORA-01700.
SQL> grant create session to erpapp1, erpapp2, erpapp3, erpapp1;
grant create session to erpapp1, erpapp2, erpapp3, erpapp1
*
ERROR at line 1:
ORA-01700: duplicate username in list
ORA-01700 means that there's a duplicated username in the grantee list, you have to identify it then remove or replace with a different one.
In this case, we correct the grantee list like this:
SQL> grant create session to erpapp1, erpapp2, erpapp3, erpapp4;
Grant succeeded.
There're more examples to grant privileges correctly, you may have a look.