Error when trying to check for update

I am using Syncthing happily on Kubuntu and Windows. All worked well for 2 years until last week I started to get on the kubuntu machine:

E: Conflicting values set for option Signed-By regarding source https://apt.syncthing.net/ syncthing: /etc/apt/keyrings/syncthing-archive-keyring.gpg != E: The list of sources could not be read.

Any idea where to start to fix this? I have been reading the documentation and searched for a solution and I still have no idea how to fix these as all look normal.

I am an intermediate level user level on Linux.

You seem to have several files pointing at the same APT source, but not identical. I’d try grepping for (part of) the URL in /etc and removing / editing all matching files. Then start fresh by following the instructions at the Syncthing APT website.

Thanks André,

Which files would I need to modify? I do not know the functions of the files I have found and hesitant to change things.

I have found 4 files containing the URL:

1- syncthing.list

2- syncthing.list.distUpgrade

3- syncthing.sources

4- syncthing.sources.save

I have attache the screen shot as this text box trow an error on submission (too many URL)

Grateful for any help from anyone. The problem is not a pleasant experience, but also a good opportunity for learning.

H.

I’d delete everything except for syncthing.sources.

I’d delete all four of them and simply follow the instructions at https://apt.syncthing.net again. That will be the right way.

Make sure you choose the stable-v2 variant if you want the modern version.