Duplicate values restriction after deletion problem

Duplicate values restriction after deletion problem

Thank the almighty for every second!

Hi,
In leads and contacts we do not allow duplicate values in Mobile number.

After a lead is converted to a contact and the contact gets deleted, There is no option to create this lead again as it is saved in the "Converted leads" so it is recognized as a duplicate value...

Besides Recreating the lead with the mobile number in another field, is there any other oprion?