Setting Due Date in past

I need help about due date input area ( or something else that will solve my problem)

While creating or updating issues, due date can be set to a past date. For example, a team lead can request a bugfix about x job, than set due date to after or earlier 10 days from today. Developer or another user can change due date to past or future afterward also.

Postponing due date is no problem, but setting due date past is causing trouble about analytic etc.