diff --git a/docs/en/04_Changelogs/4.0.0.md b/docs/en/04_Changelogs/4.0.0.md
index 58770dcb6..33e4373af 100644
--- a/docs/en/04_Changelogs/4.0.0.md
+++ b/docs/en/04_Changelogs/4.0.0.md
@@ -1380,6 +1380,7 @@ A very small number of methods were chosen for deprecation, and will be removed
 * `DataObjectSchema` class added to assist with mapping between classes and tables.
 * `DBMoney` values are now treated as empty only if `Amount` field is null. If an `Amount` value
   is provided without a `Currency` specified, it will be formatted as per the current locale.
+* Removed `DatabaseAdmin#clearAllData()`. Use `DB::get_conn()->clearAllData()` instead
 
 The below methods have been added or had their functionality updated to `DBDate`, `DBTime` and `DBDatetime`
 * `getTimestamp()` added to get the respective date / time as unix timestamp (seconds since 1970-01-01)
diff --git a/src/ORM/DatabaseAdmin.php b/src/ORM/DatabaseAdmin.php
index e81ef6250..5f63b1fef 100644
--- a/src/ORM/DatabaseAdmin.php
+++ b/src/ORM/DatabaseAdmin.php
@@ -361,17 +361,6 @@ class DatabaseAdmin extends Controller
         ClassInfo::reset_db_cache();
     }
 
-    /**
-     * Clear all data out of the database
-     *
-     * @deprecated since version 4.0
-     */
-    public function clearAllData()
-    {
-        Deprecation::notice('4.0', 'Use DB::get_conn()->clearAllData() instead');
-        DB::get_conn()->clearAllData();
-    }
-
     /**
      * Remove invalid records from tables - that is, records that don't have
      * corresponding records in their parent class tables.