When a record fails validation, the default setting is to keep the changes. If you are using MDS for reference data and someone tries to make an invalid change and they don't remember what the previous value was or they just don't fix the record then any views that utilize the ValidationStatus column will drop the newly failed records that may have previously been fine.
For reference data this isn't good. You can't just have records drop out of your reference set because a validation failed, you should only have the attempted change drop out.
I've looked but there doesn't seem to be a "Discard changes" action in the business rules. Is there another way to do this?
This is in 2012