ORA-01276 Error on oakcli create snapshotdb

I have an ODA where we're trying to create a snapshot database using oakcli:

root@oc2-mam-ora01 ~]# oakcli create snapshotdb -db stgmam -from usmam

INFO: 2018-02-01 17:10:24: Please check the logfile '/opt/oracle/oak/log/oc2-mam-ora01/tools/12.1.2.11.0/createdb_stgmam_70462.log' for more details

Please enter the 'root' password :

Please re-enter the 'root' password:

Please enter the 'SYS' password for the Database usmam:

Please re-enter the 'SYS' password:

Please select one of the following for Database Deployment [1 .. 2] :

1 => RACONE

2 => RAC

2

The selected value is : RAC

Please select one of the following for Database Class [1 .. 6] :

1 => odb-01s ( 1 cores , 4 GB memory)

2 => odb-01 ( 1 cores , 8 GB memory)