Schedule maintenance loop

We use release-based schedules.

It appears that our EDI has dumped all the orders for a particular customer
with a release date of 11/11/11.

Upon trying to change this date we receive the error...

"Release date cannot be later than the current system date."

Okay. I change the date to today's date...

"Release date cannot be less than current release date."

Either way I cannot get past this. I cannot go into schedule details. I
cannot change anything including delete the existing releases.

When something like this happens the schedule status is usually in some sort
of error and it's usually easier (especially with a lot of part numbers) to
just redump the last known good set of schedules (after verifying in AIPX1 &
4 that they are sound)

However...

They just sit in AIPX1 &  4, ever after attempting to redump them.

All validation sleepers are running so that should not be a problem.

The status of the schedules are "New" so we cannot delete them to revert
back to one that will let us dump replacement ones in.

Thanks for any advice.

Alan