All chats being deleted

[tfe]

I haven't run a backup in a few weeks, but today I noticed gmvault deleting (presumably) all of my backed up chats.

I haven't changed anything in my Gmail/Google account but presumably Google stopped returning any chats in my account so gmvault is dutifully deleting them from the local backup:

Call Gmail to check the stored chats against the Gmail chats ids and see which ones have been deleted.

This might take a few minutes ...

Will delete 51566 chat(s) from gmvault db.

gm_id [id] not in the Gmail server. Delete it.
gm_id [id] not in the Gmail server. Delete it.
[...]

Has anyone else seen this? I have searched around and haven't seen anyone else talking about missing chats. I logged into my Gmail account and cannot find my chat history there either, though it's been years since I used gchat or tried to view them through my Gmail account.

I know this almost certainly is not a bug in gmvault but I am hoping this is the best place to connect with someone who is seeing the same problematic Google behavior.

[prewriter]

I've got this e-mail on 2022-09-01:

From: The Google Apps Team <[email protected]>
Subject: Important information about the upgrade from Google Hangouts to Google Chat

Earlier this year, we announced that all Hangouts users would be upgraded to Google Chat. As the last step of the upgrade, starting November 1, 2022, Hangouts on the web will be upgraded to Chat on the web. We are emailing you because some of your conversations or portions of conversations won’t automatically migrate from Hangouts to Chat.

If you wish to keep your Hangouts conversations, we strongly encourage you to use Google Takeout and download your data before January 1, 2023 when Hangouts data will be deleted.

Rest assured that Hangouts on the web and your conversations there will remain accessible in Hangouts until November 1, 2022.

...

How do I download my data?

Starting November 1, 2022, Hangouts on the web will no longer be available. If you wish to keep your Hangouts data, we strongly encourage you to use Google Takeout and download a copy before January 1, 2023. You can find step by step instructions for Takeout here.
...