I have changed the status of a config entity in the import tracking table to 'DISABLE_AUTO_UPDATE', which I expect this entity will be skipped for future updates. However, it seems upon the next import, the status is changed back to 'imported' again.
Mark a dependent config entity as 'disable_auto_update' in the import_tracking table, then import the parent entity.
Fix the bug.
Needs work
2.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Instead of using custom code and direct DB access to modify the tracking table, if you can provide steps to reproduce the issue using the acquia_contenthub_unsubscribe module, it will be a more compelling case to get this fixed.