diff --git a/tidb-configuration-file.md b/tidb-configuration-file.md
index 20a69a6580bf1..4d9b426453c16 100644
--- a/tidb-configuration-file.md
+++ b/tidb-configuration-file.md
@@ -557,12 +557,6 @@ Configurations related to the `events_statement_summary_by_digest` table.
 
 The `experimental` section describes configurations related to the experimental features of TiDB. This section is introduced since v3.1.0.
 
-### `allow-auto-random` <span class="version-mark">New in v3.1.0</span>
-
-- Determines whether to allow using `AUTO_RANDOM`.
-- Default value: `false`
-- By default, TiDB does not support using `AUTO_RANDOM`. When the value is `true`, you cannot set `alter-primary-key` to `true` at the same time.
-
 ### `allow-expression-index` <span class="version-mark">New in v4.0.0</span>
 
 - Determines whether to create the expression index.