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f7c8967604
Part of https://github.com/element-hq/synapse/issues/19671 Spawning from [discussion in `#synapse-dev:matrix.org`](https://matrix.to/#/!i5D5LLct_DYG-4hQprLzrxdbZ580U9UB6AEgFnk6rZQ/$Z3nqbH0Qy21FWC3qJOim6LSRCRpJ3pxV5DLXm98IA6I?via=element.io&via=matrix.org&via=beeper.com) with roots in https://github.com/element-hq/synapse/pull/19558#discussion_r3013184415. As trialed/discovered by @turt2live alongside @reivilibre and @clokep ❤️ ### Why is this necessary? If you forget to add `_setup_sequence(...)`, you can run into the following error if there is 1 row in SQLite and then you use the `portdb` script to try to migrate to Postgres (as [explained](https://matrix.to/#/!i5D5LLct_DYG-4hQprLzrxdbZ580U9UB6AEgFnk6rZQ/$mHU6dcTNL7NMfKBCJUekCh7vDj1lr1GDjriZQl7oeeU?via=element.io&via=matrix.org&via=beeper.com) by @reivilibre) ``` Postgres sequence 'quarantined_media_id_seq' is inconsistent with associated stream position of 'quarantined_media' in the 'stream_positions' table. ```