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Update src/current/_includes/releases/v24.1/v24.1.0.md
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mdlinville authored May 10, 2024
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Expand Up @@ -242,7 +242,7 @@ In CockroachDB Self-Hosted, all available features are free to use unless their
Before [upgrading to CockroachDB v24.1]({% link v24.1/upgrade-cockroach-version.md %}), be sure to review the following backward-incompatible changes, as well as [key cluster setting changes](#v24-1-0-cluster-settings), and adjust your deployment as necessary.

- [`AS OF SYSTEM TIME`]({% link v23.2/as-of-system-time.md %}) queries can no longer use a timestamp followed by a question mark to signify a future-time value. This was an undocumented syntax. [#116830](https://github.com/cockroachdb/cockroach/pull/116830)
- The `sql.txn.read_committed_isolation.enabled` [cluster setting]({% link {{ page.version.version }}/cluster-setting.md %}) is now `true` by default. As a result, [`READ COMMITTED`]({% link {{ page.version.version }}/read-committed.md %}) transactions are **not** automatically upgraded to [`SERIALIZABLE`]({% link {{ page.version.version }}/demo-serializable.md %}), and will run as `READ COMMITTED` by default. On v23.2, refer to the [**Upgrades of SQL Transaction Isolation Level**]({% link {{ page.version.version }}/ui-sql-dashboard.md %}#upgrades-of-sql-transaction-isolation-level) graph in the DB Console to check whether any transaction is being upgraded from a weaker isolation level to `SERIALIZABLE`, and could therefore run differently on v24.1. [#118479](https://github.com/cockroachdb/cockroach/pull/118479)
- The `sql.txn.read_committed_isolation.enabled` [cluster setting]({% link {{ page.version.version }}/cluster-settings.md %}) is now `true` by default. As a result, [`READ COMMITTED`]({% link {{ page.version.version }}/read-committed.md %}) transactions are **not** automatically upgraded to [`SERIALIZABLE`]({% link {{ page.version.version }}/demo-serializable.md %}), and will run as `READ COMMITTED` by default. On v23.2, refer to the [**Upgrades of SQL Transaction Isolation Level**]({% link {{ page.version.version }}/ui-sql-dashboard.md %}#upgrades-of-sql-transaction-isolation-level) graph in the DB Console to check whether any transaction is being upgraded from a weaker isolation level to `SERIALIZABLE`, and could therefore run differently on v24.1. [#118479](https://github.com/cockroachdb/cockroach/pull/118479)

<h4 id="v24-1-0-cluster-settings">Key Cluster Setting Changes</h4>

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