I've created a new tag "LinuxOnAzure". But it seems that the superuser doesn't allow the upper case in tags. So the tag becomes "linuxonazure". It's not good for reading.

I would like to change it to "linux-on-azure". But the system tells me that the tag "linux-on-azure" is same as "LinuxOnAzure".

Is there anyway to edit the existing tag or create the new tag with "linux-on-azure"?

Update： Here is the error information