cannot remove client iqn when name it in capital letters, but can be created

I create a new iqn which is named：``` iqn.2018-12.com.wz:TEST001 ```, which has capital letters in it, then I try to remove it, the response of it shows ``` ok ```, but when I exit gwcli, and come in it again, I found it is still here! I try to map it with iscsi in windows OS, and I found that it is not supported capital letters in iqn name, it will turn it in lowercase. I think capital letters should not in iqn name, but it seems that you didn't prevent it, Is that in case?