This does not seem to be related to the SHA1 deprecation in APT - https://wiki.debian.org/Teams/Apt/Sha1Removal - as this would not get to that stage / show a warning there.
This does not seem to be related to the SHA1 deprecation in APT - https:/ /wiki.debian. org/Teams/ Apt/Sha1Removal - as this would not get to that stage / show a warning there.