diff --git a/lib/config/migrate-validate.ts b/lib/config/migrate-validate.ts
index 97433b7e923c10..91865925c8df88 100644
--- a/lib/config/migrate-validate.ts
+++ b/lib/config/migrate-validate.ts
@@ -1,4 +1,5 @@
 import is from '@sindresorhus/is';
+import { dequal } from 'dequal';
 import { logger } from '../logger';
 import * as configMassage from './massage';
 import * as configMigration from './migration';
@@ -21,7 +22,10 @@ export async function migrateAndValidate(
       logger.debug('No config migration necessary');
     }
     const massagedConfig = configMassage.massageConfig(migratedConfig);
-    logger.debug({ config: massagedConfig }, 'massaged config');
+    // log only if it's changed
+    if (!dequal(input, massagedConfig)) {
+      logger.debug({ config: massagedConfig }, 'Post-massage config');
+    }
     const {
       warnings,
       errors,
diff --git a/lib/workers/repository/init/merge.ts b/lib/workers/repository/init/merge.ts
index e26570c6382cb1..54ae0f63f266d3 100644
--- a/lib/workers/repository/init/merge.ts
+++ b/lib/workers/repository/init/merge.ts
@@ -246,7 +246,6 @@ export async function mergeRenovateConfig(
   }
   delete migratedConfig.errors;
   delete migratedConfig.warnings;
-  logger.debug({ config: migratedConfig }, 'migrated config');
   // TODO #7154
   const repository = config.repository!;
   // Decrypt before resolving in case we need npm authentication for any presets