diff --git a/core/modules/block/block.install b/core/modules/block/block.install
index 4832979..abba6b5 100644
--- a/core/modules/block/block.install
+++ b/core/modules/block/block.install
@@ -108,8 +108,12 @@ function block_update_8002() {
     $blocks[$block_id] = $block = $config_factory->getEditable('block.block.' . $block_id);
     // This block will have an invalid context mapping service and must be
     // disabled in order to prevent information disclosure.
-    $block->set('status', FALSE);
-    $block->save(TRUE);
+
+    // Just disable the blocks which has been enabled before.
+    if ($block_update_8001[$block_id]['status']) {
+      $block->set('status', FALSE);
+      $block->save(TRUE);
+    }
   }
 
   // Provides a list of plugin labels, keyed by plugin ID.