Oracle Solution for Error ora-24070

ORA-24070: cannot upgrade queue table string while it is being downgraded

What triggered the Error:

attempt was made to upgrade a queue table, but a previous command to downgrade the queue table has not yet completed succesfully.

What should we do to fix it:

mplete the downgrade of the queue table by re-executing the DBMS_AQADM.MIGRATE_QUEUE_TABLE procedure. Then, upgrade the queue table.