replicate.module now has several hooks to support core entity types. These hooks (with exceptions for node and comment) all do just 1 thing:
setting the entity id (and revision id if it exists) to NULL. This can be done in a more generic way in a separate function so it can also be used by contrib. Patch will follow.
Closed: outdated
1.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.