Ensures that the cache is updated properly with cache refreshers, ensures that the GetAll method for public access repo doesn't make any db calls and uses a non validating cache since it gets called a ton.

src/Umbraco.Core/Models/PublicAccessEntry.cs

@@ -127,7 +127,7 @@ namespace Umbraco.Core.Models
             set
             {
                 base.Key = value;
-                HasIdentity = true;
+                Id = value.GetHashCode();
             }
         }