diff --git a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/cassandra/CassandraReactiveDataAutoConfiguration.java b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/cassandra/CassandraReactiveDataAutoConfiguration.java
index 2d173e2bcb0..f5c866fe394 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/cassandra/CassandraReactiveDataAutoConfiguration.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/cassandra/CassandraReactiveDataAutoConfiguration.java
@@ -55,6 +55,7 @@ public class CassandraReactiveDataAutoConfiguration {
 	}
 
 	@Bean
+	@ConditionalOnMissingBean
 	public ReactiveSessionFactory reactiveCassandraSessionFactory(ReactiveSession reactiveCassandraSession) {
 		return new DefaultReactiveSessionFactory(reactiveCassandraSession);
 	}