Fixing SQL performance Baseline - Multitenant DB

Hi Team,

We are on Oracle database 19.28 version. We are trying to fix plan for one sql using baseline. But we are able to run the procedure from CDB. From PDB,it says snapshots not exist. Is it expected? We have CDB with single PDB currently. This is a new database.

SQL> sho pdbs

CON_ID CON_NAME                       OPEN MODE  RESTRICTED

     2 PDB$SEED                       READ ONLY  NO

     3 PRODDB1                        READ WRITE NO

SQL> alter session set container=PRODDB1;

Session altered.

SQL> DECLARE

  l_plans_loaded  PLS_INTEGER;

  2    3  BEGIN

  l_plans_loaded := DBMS_SPM.LOAD_PLANS_FROM_AWR(

  4    5                        begin_snap   => &begin_snapshot_id,