docs: explain masking incompatibility (#12255)

docs/source/data/fragments.mdx

@@ -1138,11 +1138,11 @@ const config: CodegenConfig = {
 Support for the `@unmask` directive was introduced with `@graphql-codegen/client-preset` [v4.5.1](https://github.com/dotansimha/graphql-code-generator/releases/tag/release-1732308151614)
 </Note>
 
-Add the following configuration to your GraphQL Codegen config.
+You can't use the `client-preset` [Fragment Masking](https://the-guild.dev/graphql/codegen/plugins/presets/preset-client#fragment-masking) and Apollo Client's data masking features simultaneously.
+The incompatibility between the features is in runtime behavior only.
+Apollo's data masking uses the same type output generated by CodeGen's Fragment Masking feature.
 
-<Caution>
-The [Fragment Masking](https://the-guild.dev/graphql/codegen/plugins/presets/preset-client#fragment-masking) feature in the client preset is incompatible with Apollo Client's data masking feature. You need to [turn off Fragment Masking](https://the-guild.dev/graphql/codegen/plugins/presets/preset-client#how-to-disable-fragment-masking) in your configuration (included below). If you use the [generated `useFragment` function](https://the-guild.dev/graphql/codegen/plugins/presets/preset-client#the-usefragment-helper), you must use Apollo Client's [`useFragment`](#usefragment) hook instead.
-</Caution>
+If you've [enabled data masking](#enabling-data-masking) in Apollo Client, make sure you [turn off Fragment Masking](https://the-guild.dev/graphql/codegen/plugins/presets/preset-client#how-to-disable-fragment-masking) in your GraphQL Codegen config, along with these additions:
 
 ```ts title="codegen.ts"
 const config: CodegenConfig = {
@@ -1166,6 +1166,8 @@ const config: CodegenConfig = {
 }
 ```
 
+Additionally, if you use the [generated `useFragment` function](https://the-guild.dev/graphql/codegen/plugins/presets/preset-client#the-usefragment-helper), you must use Apollo Client's [`useFragment`](#usefragment) hook instead.
+
 #### Opting in to use masked types
 
 <Note>