Removing SLA for workaround on default due date

The SLAs already setup in the sytem had default rules set which automatically creates a due date. To try to stop the creation of an automatic due date we removed the rules from the SLAs.

That has made all new requests overdue. If we manuall change the due date, this is ok until someone edit's the request. The due date then is automatically calculated again and the request becomes overdue.

We can't delete the SLA's entirely as the system returns the error
"FAILURE : Could not delete the selected SLA('s). Selected SLA('s) is referenced in some other object"

What we want to achieve is to be able to manually set the due date and have them not change automatically when we edit the record.

The way the SLA creates the due date is never going to work as some request with the same SLA can take varying amounts of time to complete.

We are happy to delete the link to the SLA in our old requests if this will help and you tell us how to do this.