if we can to create duplicate, we can use force duplicate.

crmLead.go

 	CreatedAccountID     string `json:"createdAccountId,omitempty"`
 	CreatedContactID     string `json:"createdContactId,omitempty"`
 	CreatedOpportunityID string `json:"createdOpportunityId,omitempty"`
+
+	ForceDuplicate bool `json:"forceDuplicate,omitempty"` //when purposely creating duplicated record, we need to set this to true
 }
 
 type crmdSearchLead struct {