Repository errors with Debian Sid

I’ve been getting the following errors:

 # apt update
Hit:1 http://dl.google.com/linux/chrome/deb stable InRelease
Get:2 http://apt.insync.io/debian trixie InRelease [5,542 B]                                                                      
Hit:3 https://dl.winehq.org/wine-builds/debian trixie InRelease                                                                   
Get:4 https://download.docker.com/linux/debian bookworm InRelease [43.3 kB]                                                       
Hit:5 http://debian-archive.trafficmanager.net/debian unstable InRelease                                                          
Hit:6 http://aptosid.com/debian sid InRelease                                                                                     
Get:7 https://pkgs.tailscale.com/stable/debian trixie InRelease                           
Hit:8 https://packages.microsoft.com/repos/code stable InRelease                          
Ign:9 http://apt.insync.io/debian trixie/non-free Translation-en    
Ign:10 http://apt.insync.io/debian trixie/non-free amd64 Components
Ign:11 http://apt.insync.io/debian trixie/non-free Icons (48x48)
Ign:12 http://apt.insync.io/debian trixie/non-free Icons (64x64)
Hit:13 http://www.deb-multimedia.org sid InRelease
Ign:14 http://apt.insync.io/debian trixie/contrib Translation-en
Ign:15 http://apt.insync.io/debian trixie/contrib amd64 Components
Ign:16 http://apt.insync.io/debian trixie/contrib Icons (48x48)
Ign:17 http://apt.insync.io/debian trixie/contrib Icons (64x64)
Ign:9 http://apt.insync.io/debian trixie/non-free Translation-en
Ign:10 http://apt.insync.io/debian trixie/non-free amd64 Components
Ign:11 http://apt.insync.io/debian trixie/non-free Icons (48x48)
Ign:12 http://apt.insync.io/debian trixie/non-free Icons (64x64)
Ign:14 http://apt.insync.io/debian trixie/contrib Translation-en
Ign:15 http://apt.insync.io/debian trixie/contrib amd64 Components
Ign:16 http://apt.insync.io/debian trixie/contrib Icons (48x48)
Ign:17 http://apt.insync.io/debian trixie/contrib Icons (64x64)
Ign:9 http://apt.insync.io/debian trixie/non-free Translation-en
Ign:10 http://apt.insync.io/debian trixie/non-free amd64 Components
Ign:11 http://apt.insync.io/debian trixie/non-free Icons (48x48)
Ign:12 http://apt.insync.io/debian trixie/non-free Icons (64x64)
Ign:14 http://apt.insync.io/debian trixie/contrib Translation-en
Ign:15 http://apt.insync.io/debian trixie/contrib amd64 Components
Ign:16 http://apt.insync.io/debian trixie/contrib Icons (48x48)
Ign:17 http://apt.insync.io/debian trixie/contrib Icons (64x64)
Err:9 http://apt.insync.io/debian trixie/non-free Translation-en
  404  Not Found [IP: 169.150.236.100 80]
Ign:10 http://apt.insync.io/debian trixie/non-free amd64 Components
Ign:11 http://apt.insync.io/debian trixie/non-free Icons (48x48)
Ign:12 http://apt.insync.io/debian trixie/non-free Icons (64x64)
Ign:14 http://apt.insync.io/debian trixie/contrib Translation-en
Ign:15 http://apt.insync.io/debian trixie/contrib amd64 Components
Ign:16 http://apt.insync.io/debian trixie/contrib Icons (48x48)
Ign:17 http://apt.insync.io/debian trixie/contrib Icons (64x64)
Fetched 55.4 kB in 3s (17.9 kB/s)
Warning: Conflicting distribution: http://apt.insync.io/debian trixie InRelease (expected trixie but got sid)
Error: Failed to fetch http://apt.insync.io/debian/dists/trixie/non-free/i18n/Translation-en  404  Not Found [IP: 169.150.236.100 80]
Error: Some index files failed to download. They have been ignored, or old ones used instead.

This happened even after purging insync, removing repository and key, and reinstalling the latest.

I am running Debian Sid. What makes it more puzzling is that I have two other machines running Debian Sid and no problems with those.

Here is the repo list file (installed and not altered):

# cat /etc/apt/sources.list.d/insync.list 
deb [signed-by=/etc/apt/trusted.gpg.d/insynchq.gpg] http://apt.insync.io/debian trixie non-free contrib

Does anyone have any ideas of what could be wrong?

@finotti My apologies for the trouble! Let me forward this to our engineers for further investigation.