Unified auditing: drop policy doesn't work

Oracle 19c Standard Edition 2:

I cannot drop the policy foestest.

I tried:

noaudit policy foetest;

---> Noaudit erfolgreich. (successfull)

DROP audit POLICY foetest;

--->

Fehler beim Start in Zeile: 14 in Befehl -

DROP audit POLICY foetest

Fehlerbericht -

ORA-46361: Audit-Policy kann nicht gelöscht werden, weil sie aktuell aktiviert ist.

46361. 00000 - "Audit policy cannot be dropped as it is currently enabled."

*Cause:   An attempt was made to drop the audit policy which is currently enabled.

*Action:  Disable the audit policy before dropping.

Why?