Can't delete a git TAG

git -c core.quotepath=false tag -d t1 
Deleted tag 't1' (was 0a8bca5)
Completed successfully

git -c core.quotepath=false push -v --tags origin master:master 
Pushing to https://ajaynz@github.com/ajaynz/TEST.git
POST git-receive-pack (287 bytes)
To https://ajaynz@github.com/ajaynz/TEST.git
 = [up to date]      master -> master
 = [up to date]      t1 -> t1
 = [up to date]      t2 -> t2
 * [new tag]         test -> test
updating local tracking ref 'refs/remotes/origin/master'
Completed successfully