Synchronize two changes in docs-cn/pull/5856 (#5148) (#5149)

pingcap · Mar 29, 2021 · 34e4006 · 34e4006
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diff --git a/error-codes.md b/error-codes.md
@@ -177,7 +177,7 @@ TiDB is compatible with the error codes in MySQL, and in most cases returns the
 
 * Error Number: 8055
 
-    The current snapshot is too old. The data may have been garbage collected. You can increase the value of [`tidb_gc_life_time`](/system-variables.md#tidb_gc_life_time-new-in-v50-ga) to avoid this problem. The new version of TiDB automatically reserves data for long-running transactions. Usually this error does not occur. 
+    The current snapshot is too old. The data may have been garbage collected. You can increase the value of [`tidb_gc_life_time`](/system-variables.md#tidb_gc_life_time-new-in-v50-ga) to avoid this problem. TiDB automatically reserves data for long-running transactions. Usually this error does not occur. 
 
     See [garbage collection overview](/garbage-collection-overview.md) and [garbage collection configuration](/garbage-collection-configuration.md).
 

diff --git a/system-variables.md b/system-variables.md
@@ -629,7 +629,7 @@ For a system upgraded to v5.0.0-rc from an earlier version, if you have not modi
 - Default value: ON
 - Enables garbage collection for TiKV. Disabling garbage collection will reduce system performance, as old versions of rows will no longer be purged.
 
-## tidb_gc_life_time <span class="version-mark">New in v5.0 GA</span>
+### tidb_gc_life_time <span class="version-mark">New in v5.0 GA</span>
 
 - Scope: GLOBAL
 - Default: `"10m0s"`