only in patch2:
unchanged:
--- a/config/schema/paragraphs_type.schema.yml
+++ b/config/schema/paragraphs_type.schema.yml
@@ -94,3 +94,5 @@ field.widget.settings.paragraphs:
       type: string
     default_paragraph_type:
       type: string
+    show_duplicate:
+      type: boolean