Why can't errored account combinations used in subledgers be corrected in the subledger?

Summary:

Cross Validation rules work very well in General Ledger; however, the rules do not apply to the combinations entered in the subledgers. While most account combinations are configured in the subledger, there are adhoc transactions that occasionally require for the combinations to be entered manually in the subledger. When these combinations are not aligned to the CVR the transactions go into error and the only way we can fix these is to disable the control, reverse the original transaction and then post to the GL. It would be ideal if the user can fix the combination in the subledger