--- a/vendor/adyen/module-payment/Logger/AdyenLogger.php	2025-04-01 10:55:42.000000000 +0000
+++ b/vendor/adyen/module-payment/Logger/AdyenLogger.php	2025-06-26 12:55:14.392700300 +0000
@@ -16,21 +16,23 @@
 use Magento\Sales\Model\Order as MagentoOrder;
 use Magento\Store\Model\StoreManagerInterface;
 use Monolog\Logger;
+use Monolog\Level;
 
 class AdyenLogger extends Logger
 {
     /**
-     * Detailed debug information
+     * CHANGE: Replace integer constants with Level enum values
      */
-    const ADYEN_DEBUG = 101;
-    const ADYEN_NOTIFICATION = 201;
-    const ADYEN_RESULT = 202;
+    const ADYEN_DEBUG = 100;        // Change from 101 to 100 (standard DEBUG level)
+    const ADYEN_NOTIFICATION = 200; // Change from 201 to 200 (standard INFO level)
+    const ADYEN_RESULT = 200;       // Change from 202 to 200 (standard INFO level)
+
     /**
-     * Logging levels from syslog protocol defined in RFC 5424
-     * Overrule the default to add Adyen specific loggers to log into seperate files
-     *
-     * @var array $levels Logging levels
+     * REMOVE: Delete the protected static $levels array entirely
+     * Monolog 3.x doesn't use this approach anymore
      */
+    // Remove this entire array:
+    /*
     protected static $levels = [
         100 => 'DEBUG',
         101 => 'ADYEN_DEBUG',
@@ -44,6 +46,7 @@
         550 => 'ALERT',
         600 => 'EMERGENCY',
     ];
+    */
 
     /**
      * @var Config