Because if jessie is stable still has in the release the Valid-Until line?

This creates problems for me in PCs that do not have access to the Internet.

In debian, they eliminate this line when they declare the distribution
stable.

How can I remove this line from the release without the repository error me
when loading it?

Origin: Devuan
Label: Devuan
Suite: stable
Version: 1.0
Codename: jessie
Date: Sun, 18 Jun 2017 18:01:22 UTC
Valid-Until: Sun, 25 Jun 2017 18:01:22 UTC
Architectures: alpha amd64 arm64 armel armhf hppa i386 ia64 mips mipsel
powerpc ppc64el s390x sparc
Components: main contrib non-free
Description: Devuan 1.0 Jessie (stable release)

Best Regards
--
Ismael
Devuan User : http://distrowatch.com/table.php?distribution=devuan