* Delete tag API Signed-off-by: jolheiser <john.olheiser@gmail.com> * Wording Signed-off-by: jolheiser <john.olheiser@gmail.com> * Add conflict response and fix API tests Signed-off-by: jolheiser <john.olheiser@gmail.com> * Fix other test Signed-off-by: jolheiser <john.olheiser@gmail.com> Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>