diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index <HASH>..<HASH> 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -106,10 +106,6 @@ return $v; })
                     ->end()
                 ->end()
                 ->arrayNode('serializer')
-                    ->validate()
-                        ->ifTrue(function ($v) { return !empty($v['version']) && !empty($v['groups']); })
-                        ->thenInvalid('Only either a version or a groups exclusion strategy can be set')
-                    ->end()
                     ->addDefaultsIfNotSet()
                     ->children()
                         ->scalarNode('version')->defaultNull()->end()
Removing conflicting validation rule.

While PR #<I> added support for using both serialization groups and versions, the configuration validation was not updated to reflect these changes. This commit simply removes the specific validation rule that is affected.