Fix documenation of entity state-detection strategies.

Closes #2230

Author: schauder

src/main/asciidoc/jpa.adoc

@@ -150,7 +150,7 @@ Spring Data JPA offers the following strategies to detect whether an entity is n
 2. Implementing `Persistable`: If an entity implements `Persistable`, Spring Data JPA delegates the new detection to the `isNew(…)` method of the entity. See the link:$$https://docs.spring.io/spring-data/data-commons/docs/current/api/index.html?org/springframework/data/domain/Persistable.html$$[JavaDoc] for details.
 3. Implementing `EntityInformation`: You can customize the `EntityInformation` abstraction used in the `SimpleJpaRepository` implementation by creating a subclass of `JpaRepositoryFactory` and overriding the `getEntityInformation(…)` method accordingly. You then have to register the custom implementation of `JpaRepositoryFactory` as a Spring bean. Note that this should be rarely necessary. See the link:$$https://docs.spring.io/spring-data/data-jpa/docs/current/api/index.html?org/springframework/data/jpa/repository/support/JpaRepositoryFactory.html$$[JavaDoc] for details.
 
-Option 1 is not an option for entities that use manually assigned identifiers as with those the identifier will always be non-`null`.
+Option 1 is not an option for entities that use manually assigned identifiers and no version attribute as with those the identifier will always be non-`null`.
 A common pattern in that scenario is to use a common base class with a transient flag defaulting to indicate a new instance and using JPA lifecycle callbacks to flip that flag on persistence operations:
 
 .A base class for entities with manually assigned identifiers