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@@ -1,5 +1,27 @@ # Changelog +## Dendrite 0.13.1 (2023-07-06) + +This releases fixes a long-standing "off-by-one" error which could result in state resets. Upgrading to this version is **highly** recommended. + +When deduplicating state events, we were checking if the event in question was already in a state snapshot. If it was in a previous state snapshot, we would +then remove it from the list of events to store. If this happened, we were, unfortunately, skipping the next event to check. This resulted in +events getting stored in state snapshots where they may not be needed. When we now compared two of those state snapshots, one of them +contained the skipped event, while the other didn't. This difference possibly shouldn't exist, resulting in unexpected state resets and explains +reports of missing state events as well. + +Rooms where a state reset occurred earlier should, hopefully, reconcile over time. + +### Fixes: + +- A long-standing "off-by-one" error has been fixed, which could result in state resets +- Roomserver Prometheus Metrics are available again + +### Features + +- Updated dependencies + - Internal NATS Server has been updated from v2.9.15 to v2.9.19 + ## Dendrite 0.13.0 (2023-06-30) ### Features |