CacheCompatibilityPass will also take care of FileLockRegion.

Author: biozshock

DependencyInjection/Compiler/CacheCompatibilityPass.php

@@ -67,6 +67,11 @@ private function updateSecondLevelCache(ContainerBuilder $container, Definition
 
                 $regionDefinition = $container->getDefinition($factoryMethodCall[1][0]);
 
+                // Get inner service for FileLock
+                if ($regionDefinition->getClass() === '%doctrine.orm.second_level_cache.filelock_region.class%') {
+                    $regionDefinition = $container->getDefinition($regionDefinition->getArgument(0));
+                }
+
                 // We don't know how to adjust custom region classes
                 if ($regionDefinition->getClass() !== '%doctrine.orm.second_level_cache.default_region.class%') {
                     continue;

Tests/DependencyInjection/Compiler/CacheCompatibilityPassTest.php

@@ -52,6 +52,7 @@ public function registerContainerConfiguration(LoaderInterface $loader): void
                                 'second_level_cache' => [
                                     'enabled' => true,
                                     'regions' => [
+                                        'filelock' => ['type' => 'filelock', 'lifetime' => 0, 'cache_driver' => ['type' => 'pool', 'pool' => 'doctrine.system_cache_pool']],
                                         'lifelong' => ['lifetime' => 0, 'cache_driver' => ['type' => 'pool', 'pool' => 'doctrine.system_cache_pool']],
                                         'entity_cache_region' => ['type' => 'service', 'service' => $this->regionClass],
                                     ],