diff --git a/playground/matplus/thies-marwitz/create-part-information-uischema.json b/playground/matplus/thies-marwitz/create-part-information-uischema.json
index e3454ffd..f0067c09 100644
--- a/playground/matplus/thies-marwitz/create-part-information-uischema.json
+++ b/playground/matplus/thies-marwitz/create-part-information-uischema.json
@@ -7,7 +7,7 @@
     "ui:enableMarkdownInDescription": true,
     "ui:description": "Make text **bold** or *italic*. Take a look at other options [here](https://probablyup.com/markdown-to-jsx/)."
   },
-  "partNumber": {
+  "serial": {
     "ui:autofocus": true,
     "ui:emptyValue": "",
     "ui:placeholder": "ui:emptyValue causes this field to always be valid despite being required",