I've got a CronTrigger entry on a customer's site that has an empty CronJobDetailId that's probably preventing a new System.scheduleBatch() call from running. When I run:
  System.abortJob('08e9000000rydbcAAA');

An exception is thrown:
  System.StringException: Invalid parameter value "000000000000000" for parameter "id".

How can I abort this job?

- Thanks