skype error

gistfile1.txt

$ sudo LANG=C apt update
Hit:1 https://aquasecurity.github.io/trivy-repo/deb buster InRelease
Hit:2 http://debian-mirror.sakura.ne.jp/debian bullseye InRelease                                                                                     
Hit:3 https://repo.skype.com/deb stable InRelease                                                                                                     
Hit:4 http://debian-mirror.sakura.ne.jp/debian sid InRelease                                                                                          
Hit:5 http://dl.google.com/linux/chrome/deb stable InRelease                                                                                          
Hit:6 http://packages.microsoft.com/repos/edge stable InRelease                                                                                       
Hit:7 http://security.debian.org/debian-security bullseye-security InRelease                                                                          
Hit:8 http://deb.debian.org/debian bullseye-updates InRelease                                                                                         
Hit:9 http://packages.microsoft.com/repos/code stable InRelease                                                                    
Hit:10 https://packages.microsoft.com/debian/10/prod insiders-slow InRelease                                 
Hit:11 https://packages.microsoft.com/repos/ms-teams stable InRelease   
Err:3 https://repo.skype.com/deb stable InRelease                       
  The following signatures were invalid: EXPKEYSIG 1F3045A5DF7587C3 Skype Linux Client Repository <se-um@microsoft.com>
Hit:12 https://packagecloud.io/slacktechnologies/slack/debian jessie InRelease
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
All packages are up to date.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://repo.skype.com/deb stable InRelease: The following signatures were invalid: EXPKEYSIG 1F3045A5DF7587C3 Skype Linux Client Repository <se-um@microsoft.com>
W: Failed to fetch https://repo.skype.com/deb/dists/stable/InRelease  The following signatures were invalid: EXPKEYSIG 1F3045A5DF7587C3 Skype Linux Client Repository <se-um@microsoft.com>
W: Some index files failed to download. They have been ignored, or old ones used instead.