Comment 2 for bug 1325436

although I have a solution to fix this problem, but maybe we can treat it as not a bug but an user guide problem, for i.e., if we want to use default description while we modify the related field, then, specifiy--description '' will solve this problem. Or if we don't certain if a field will affect the default description, then we can always specify --description '' as long as we want to use the default description