element-hq / element-hq/synapse
`m.room.retention` is not carried over during room upgrade
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A-Message-Retention-Policies
S-Minor
T-Defect
- Dominant language
- Python
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Description
This issue has been migrated from [#11279](https://github.com/matrix-org/synapse/issues/11279).
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### Discussed in https://github.com/matrix-org/synapse/discussions/11277
Originally posted by **Mikaela** November 8, 2021
I just upgraded a room in https://develop.element.io/ from version 6 to version 9. The version 6 had `m.room.retention` set, but after the upgrade, I couldn't find it from the room version 9.
(snip)
I think it should carry over as it may be a privacy or data hygiene problem to those rooms that enable it (while they are a minority) and carrying it over now would help not accidentally forgetting it later.
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