diff --git a/docs/errata/README.md b/docs/errata/README.md
index 0be28d8..9f37972 100644
--- a/docs/errata/README.md
+++ b/docs/errata/README.md
@@ -2,7 +2,7 @@
 
 If you find any mistakes in the seventh edition, *C# 11 and .NET 7 - Modern Cross-Platform Development Fundamentals*, or if you have suggestions for improvements, then please [raise an issue in this repository](https://github.com/markjprice/cs11dotnet7/issues) or email me at markjprice (at) gmail.com.
 
-[**Errata** (10 items)](errata.md): Typos, tool user interface changes, or mistakes in code that would cause a compilation error that prevents a successful build.
+[**Errata** (11 items)](errata.md): Typos, tool user interface changes, or mistakes in code that would cause a compilation error that prevents a successful build.
 
 [**Improvements** (1 item)](improvements.md): Changes to text or code that would improve the content. These are optional.
 
diff --git a/docs/errata/errata.md b/docs/errata/errata.md
index 53b4d2b..4dc8f38 100644
--- a/docs/errata/errata.md
+++ b/docs/errata/errata.md
@@ -1,4 +1,4 @@
-**Errata** (10 items)
+**Errata** (11 items)
 
 If you find any mistakes, then please [raise an issue in this repository](https://github.com/markjprice/cs11dotnet7/issues) or email me at markjprice (at) gmail.com.
 
@@ -15,6 +15,7 @@ If you find any mistakes, then please [raise an issue in this repository](https:
 - [Page 244 - Init-only properties](#page-244---init-only-properties)
 - [Page 322 - Revealing the location of a type](#page-322---revealing-the-location-of-a-type)
   - [Page 412 - Compressing streams](#page-412---compressing-streams)
+  - [Page 477 - Inserting entities](#page-477---inserting-entities)
 
 # Page 4, 8 - Pros and cons of the .NET Interactive Notebooks extension, Downloading and installing Visual Studio Code
 
@@ -143,3 +144,16 @@ It should be:
 ```cs
 WriteLine("The compressed contents:");
 ```
+
+## Page 477 - Inserting entities
+
+> Thanks to [Chadwick Geyser](https://github.com/chadwickgeyser) for raising this [issue on 29 November 2022](https://github.com/markjprice/cs11dotnet7/issues/5).
+
+In Step 4, the code statement to list the products uses an older version of the method signature that I removed before publishing that only allows a single `productId` to be highlighted, as shown in the following code:
+```cs
+ListProducts(productIdToHighlight: resultAdd.productId);
+```
+It should use the method signature that allows multiple `productIds` to be highlighted, as shown in the following code:
+```cs
+ListProducts(productIdsToHighlight: new[] { resultAdd.productId });
+```