I'll delete this record:Email Marketing: Process queue,And re-create it.

You won't be able to open the app or save the email you want to send.

addons\base\models\ir_model.py", line 1908, in xmlid_lookup
raise ValueError('External ID not found in the system: %s' % xmlid)
Exception

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "odoo\http.py", line 639, in _handle_exception
return super(JsonRequest, self)._handle_exception(exception)
File "\odoo\http.py", line 315, in _handle_exception
raise exception.with_traceback(None) from new_cause
ValueError: External ID not found in the system: mass_mailing.ir_cron_mass_mailing_queue