Hi,

The reason seems to be that the key is expired.

The mitigation might be difficult. But you might have the way to do so.
Just sign the repository with the key
72E3CB773315DFA2E464743D94532124541922FB instead of
E032601B7CA10BC3EA53FA81BB23C00C61FC752C.

72E3CB773315DFA2E464743D94532124541922FB is in
/etc/apt/trusted.gpg.d/devuan-keyring-2016-archive.gpg and never expire.

After some months, just create a new key which never expire or expire
far in the future and use that for the repository.

Regards
   Klaus
-- 
Klaus Ethgen                                       http://www.ethgen.ch/
pub  4096R/4E20AF1C 2011-05-16            Klaus Ethgen <Klaus@???>
Fingerprint: 85D4 CA42 952C 949B 1753  62B3 79D0 B06F 4E20 AF1C