* Delete tag API Signed-off-by: jolheiser <[email protected]> * Wording Signed-off-by: jolheiser <[email protected]> * Add conflict response and fix API tests Signed-off-by: jolheiser <[email protected]> * Fix other test Signed-off-by: jolheiser <[email protected]> Co-authored-by: Lunny Xiao <[email protected]>