Err:12 http://dl.google.com/linux/mod-pagespeed/deb stable Release.gpg
The following signatures were invalid: EXPKEYSIG 1397BC53640DB551 Google Inc. (Linux Packages Signing Authority) <REMOVED EMAIL>
Fetched 163 kB in 2s (93.5 kB/s)
Reading package lists... Done
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://dl.google.com/linux/mod-pagespeed/deb stable Release: The following signatures were invalid: EXPKEYSIG 1397BC53640DB551 Google Inc. (Linux Packages Signing Authority) <REMOVED EMAIL>
W: Failed to fetch http://dl.google.com/linux/mod-pagespeed/deb/dists/stable/Release.gpg The following signatures were invalid: EXPKEYSIG 1397BC53640DB551 Google Inc. (Linux Packages Signing Authority) <REMOVED EMAIL>
W: Some index files failed to download. They have been ignored, or old ones used instead.
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