You can view all the locked tables in schema by executing following query:

select table_name, stattype_locked

from dba_tab_statistics

where owner = ‘MBS’ and stattype_locked is not null;

Then how to unlock them, following query will help us to sort this issue:

select ‘exec DBMS_STATS.UNLOCK_TABLE_STATS (”’|| owner ||”’,”’|| table_name ||”’);’ from dba_tab_statistics where owner = ‘MBS’ and stattype_locked is not null;

or you can do that for every single table:

exec DBMS_STATS.UNLOCK_TABLE_STATS(‘owner’,'table name’);