Update trouble

HEllo all, I'm running SolydK and Devuan. These last month I've been updating regularely without trouble. SolyK being a rolling distribution, I expected some probems with Debian 9 being released so I was not really surprised that the last update announced removing lots of things - including TDE. However, when I tried updating Devuan (which is still Jessie based AFAIK) I get the same result: no update without removing TDE! Not that I *need* to update, but what's the problem? Any idea? Thierry