piuparts job failing when run with RELEASE=stretch (404 error)

RELEASE=stretch is now supported again since the addition of archives.debian.org

But now piuparts job are failing when run with RELEASE=stretch (404 error)

Example: https://salsa.debian.org/bastif/qt-android/-/jobs/4321199

[32;1m$ sed  '/127.0.0.1/s/localhost/pipeline.salsa.debian.org localhost/' /etc/hosts > ${CHROOT_PATH}/etc/hosts[0;m
[32;1m$ PIUPARTS_DISTRIBUTION_ARG="--distribution $RELEASE"[0;m
[32;1m$ if [ "$VENDOR" = "debian" ]; then \ # collapsed multi-line command[0;m
--2023-06-16 08:13:20--  http://deb.debian.org/debian/dists/stretch/Release
Resolving deb.debian.org (deb.debian.org)... 151.101.22.132, 2a04:4e42:5::644
Connecting to deb.debian.org (deb.debian.org)|151.101.22.132|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2023-06-16 08:13:20 ERROR 404: Not Found.

section_end:1686903201:step_script
[0Ksection_start:1686903201:cleanup_file_variables
[0K[0K[36;1mCleaning up project directory and file based variables[0;m[0;m
section_end:1686903202:cleanup_file_variables
[0K[31;1mERROR: Job failed: exit code 1