Texlive update fails with BAD signature error

[Yann]

Hello,

I tried updating tlmgr (I want to install a new package), but an error 
occurs. I linked what happens with the standard mirror, the same happens 
with my default mirror 
(http://distrib-coffee.ipsl.jussieu.fr/pub/mirrors/ctan/systems/texlive/tlnet)


me at MY-PC:~$ sudo tlmgr -v update --repo 
http://mirror.ctan.org/systems/texlive/tlnet --self
D:tlmgr:main: ::tldownload_server hash:: 
{enabled:1,errorcount:0,ua:LWP::UserAgent=HASH(0x5566c32b9858)}
D:setup_programs: preferring system versions
D:program curl found in path
D:program wget found in path
D:program lz4 found in path
D:program gzip found in path
D:program xz found in path
D:Using checksum method digest::sha
D:Testing for gpg in gpg
D: ... gpg ok! [gpg --version >/dev/null 2>&1]
D:gpg command line: gpg --homedir "/usr/local/texlive/2019/tlpkg/gpg" 
--no-secmem-warning --no-permission-warning --lock-never
D:will verify cryptographic signatures
D:TLPDB.pm: trying to initialize from 
http://ctan.tetaneutral.net/systems/texlive/tlnet/tlpkg/texlive.tlpdb
D:trying to download 
http://ctan.tetaneutral.net/systems/texlive/tlnet/tlpkg/texlive.tlpdb.xz 
to /tmp/_3_UNg01A6/JF_VfheRpi
D:persistent connection set up, trying to get 
http://ctan.tetaneutral.net/systems/texlive/tlnet/tlpkg/texlive.tlpdb.xz 
(for /tmp/_3_UNg01A6/JF_VfheRpi)
D:TLUtils::download_file: downloading using lwp succeeded
D:decompressing /tmp/_3_UNg01A6/JF_VfheRpi to /tmp/_3_UNg01A6/QDv50jzPVl
D:TLUtils::system_pipe: calling "xz" -dcf < "/tmp/_3_UNg01A6/JF_VfheRpi" 
 > "/tmp/_3_UNg01A6/QDv50jzPVl"
D:TLUtils::system_pipe: removing /tmp/_3_UNg01A6/JF_VfheRpi
D:found the uncompressed xz file
D:persistent connection set up, trying to get 
http://ctan.tetaneutral.net/systems/texlive/tlnet/tlpkg/texlive.tlpdb.sha512 
(for /tmp/_3_UNg01A6/ZPK1HCgkCC)
D:TLUtils::download_file: downloading using lwp succeeded
D:persistent connection set up, trying to get 
http://ctan.tetaneutral.net/systems/texlive/tlnet/tlpkg/texlive.tlpdb.sha512.asc 
(for /tmp/_3_UNg01A6/ofOXD_t57Z)
D:TLUtils::download_file: downloading using lwp succeeded
D:STATUS OUTPUT
[GNUPG:] NEWSIG
[GNUPG:] KEYEXPIRED 1586133504
[GNUPG:] KEY_CONSIDERED C78B82D8C79512F79CC0D7C80D5E5D9106BAB6BC 0
[GNUPG:] KEYEXPIRED 1586133504
[GNUPG:] KEYEXPIRED 1586133504
[GNUPG:] KEY_CONSIDERED C78B82D8C79512F79CC0D7C80D5E5D9106BAB6BC 0
[GNUPG:] BADSIG 4CE1877E19438C70 TeX Live Distribution <tex-live at tug.org>
[GNUPG:] VERIFICATION_COMPLIANCE_MODE 23D:verify_checksum: returning 2 
and cryptographic signature verification of
   /tmp/_3_UNg01A6/ZPK1HCgkCC
against
http://ctan.tetaneutral.net/systems/texlive/tlnet/tlpkg/texlive.tlpdb.sha512.asc
failed. Output was:
gpg: Signature made Thu May 14 16:34:16 2020 CEST
gpg:                using RSA key 4CE1877E19438C70
gpg: BAD signature from "TeX Live Distribution <tex-live at tug.org>" 
[ultimate]

Please try from a different mirror and/or wait a few minutes
and try again; usually this is because of transient updates.
If problems persist, feel free to report to texlive at tug.org.


/usr/local/texlive/2019/bin/x86_64-linux/tlmgr: signature verification 
error of /tmp/_3_UNg01A6/QDv50jzPVl from 
http://ctan.tetaneutral.net/systems/texlive/tlnet/tlpkg/texlive.tlpdb: 
cryptographic signature verification of
   /tmp/_3_UNg01A6/ZPK1HCgkCC
against
http://ctan.tetaneutral.net/systems/texlive/tlnet/tlpkg/texlive.tlpdb.sha512.asc
failed. Output was:
gpg: Signature made Thu May 14 16:34:16 2020 CEST
gpg:                using RSA key 4CE1877E19438C70
gpg: BAD signature from "TeX Live Distribution <tex-live at tug.org>" 
[ultimate]

Please try from a different mirror and/or wait a few minutes
and try again; usually this is because of transient updates.
If problems persist, feel free to report to texlive at tug.org.


Thanks

Yann