Dear, My apologies! I did a mistake with `git-send-email`.
I have missed how it works. I simply did: git send-email -11 --cover-letter --annotate --to=guix-patc...@gnu.org and it is incorrect. Oups! What is the correct command line to first obtain a debbug number and second to send the series to this number ? Thank you in advance. And sorry again for the mistake. All the best, simon