diff --git a/core/modules/layout_builder/layout_builder.install b/core/modules/layout_builder/layout_builder.install
index ec16a05537..1d5c389c7a 100644
--- a/core/modules/layout_builder/layout_builder.install
+++ b/core/modules/layout_builder/layout_builder.install
@@ -136,3 +136,11 @@ function layout_builder_update_8602() {
   ];
   Database::getConnection()->schema()->createTable('inline_block_usage', $inline_block_usage);
 }
+
+/**
+ * Increase the size of the section column in the node__layout_builder__layout table.
+ */
+function layout_builder_update_8603() {
+  $database = \Drupal::database();
+  $database->query("ALTER TABLE node__layout_builder__layout MODIFY layout_builder__layout_section LONGBLOB;");
+}
diff --git a/core/modules/layout_builder/src/Plugin/Field/FieldType/LayoutSectionItem.php b/core/modules/layout_builder/src/Plugin/Field/FieldType/LayoutSectionItem.php
index 0865f0c7c5..4e3245a700 100644
--- a/core/modules/layout_builder/src/Plugin/Field/FieldType/LayoutSectionItem.php
+++ b/core/modules/layout_builder/src/Plugin/Field/FieldType/LayoutSectionItem.php
@@ -66,7 +66,7 @@ public static function schema(FieldStorageDefinitionInterface $field_definition)
       'columns' => [
         'section' => [
           'type' => 'blob',
-          'size' => 'normal',
+          'size' => 'big',
           'serialize' => TRUE,
         ],
       ],