Error:Apex trigger leadupdatecontact caused an unexpected exception, contact your administrator: leadupdatecontact: execution of AfterUpdate caused by: System.DmlException: Update failed. First exception on row 0; first error: MISSING_ARGUMENT, Id not specified in an update call: []: Trigger.leadupdatecontact: line 10, column 1
trigger leadupdatecontact on Lead(after update){
list<contact> con=new list<contact>();
// list<lead> lea=new list<lead>();
for(Lead le :trigger.new){
contact co=new contact();
if((le.description!= Null)&&(co.description!=le.description))
co.description=le.description;
co.id=le.convertedcontactid;
con.add(co);
update con;
}
}