I am afraid that I will lose my data if I convert a Lead to a Contact or a Deal. What should I do? Why are some fields from Leads already mapped by default? Can I delete the default mapping? How do I add a mapping for lead conversion? How do I delete a field mapping in Lead conversion? How do I modify a field mapping for lead conversion? Why can't I see the Leads Conversion Data Mapping setting in the CRM? Can I add any field from Leads as a part of field mapping? Why cannot I map the Created Time field from leads to contacts?