Postgres CDC: some tables have Incremental, others dont

What causes some tables to have Incremental Append as an option, and others not? Is this expected ?
On thing that I noted is that the tables where Incremental was not an option do not have primary keys, but I am not sure this is related.
The two prints are from the same connection.
(Postgres CDC β†’ S3 Parquet connection)

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Hi @auyer,

Yes indeed, the source table needs to have a primary key to be loaded incrementally, because it’s using the table primary key for downstream duplication if Incremental - Deduped history is enabled.