When I invoke `dget -x
http://http.debian.net/debian/pool/main/i/isc-dhcp/isc-dhcp_4.4.3-P1-2.dsc`
from the shell it fails to verify the signature because the public key is
not present in the local keyring. Updating the local keyring didn't help,
as the key pertaining to the relevant maintainer has been updated in the
keyring, but the package is still using the old signature.

$ dget -x
http://http.debian.net/debian/pool/main/i/isc-dhcp/isc-dhcp_4.4.3-P1-2.dsc
...
...
isc-dhcp_4.4.3-P1-2.dsc:
dscverify: isc-dhcp_4.4.3-P1-2.dsc failed signature check:
gpg: Signature made Fri 05 May 2023 01:47:46 PM UTC
gpg:                using EDDSA key 59563CED63C6FE4F2E37A07D62B410892A1DBA1D
gpg:                issuer "santiago@debian.org"
gpg: Can't check signature: No public key
Validation FAILED!!

I suggest that the package is updated with the newer signature so that
the package can be validated.

I am running:
Distributor ID: Debian
Description:    Debian GNU/Linux 12 (bookworm)
Release:        12
Codename:       bookworm
kernel:         5.15.0-112-generic

Thanks.

Dear submitter,

as the package isc-dhcp has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/1143544

The version of this package that was in Debian prior to this removal
can still be found using https://snapshot.debian.org/.

Please note that the changes have been done on the master archive and
will not propagate to any mirrors until the next dinstall run at the
earliest.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Thorsten Alteholz (the ftpmaster behind the curtain)