How to filter opportunity with "Converted" status

Opportunity status field does not show value “Converted” in look up. How to filter that out?

Moreover, it gives error while changing such record (opportunity) which has status as “Converted”. Please see following screenshot.

You have to edit the status options via Customize Form

Thank Rushabh.

Thanking you,

With Regards,
Deven Shah
Safeworld Systems Pvt Ltd
M - 09825060116