diff --git a/src/Drupal/Commands/core/DeployHookCommands.php b/src/Drupal/Commands/core/DeployHookCommands.php
index 5517698de8..3e387439f9 100644
--- a/src/Drupal/Commands/core/DeployHookCommands.php
+++ b/src/Drupal/Commands/core/DeployHookCommands.php
@@ -204,7 +204,9 @@ public static function updateDoOneDeployHook(string $function, DrushBatchContext
                 Drush::logger()->error($e->getMessage());
 
                 $variables = Error::decodeException($e);
-                unset($variables['backtrace']);
+                $variables = array_filter($variables, function ($key) {
+                    return $key[0] == '@' || $key[0] == '%';
+                }, ARRAY_FILTER_USE_KEY);
                 // On windows there is a problem with json encoding a string with backslashes.
                 $variables['%file'] = strtr($variables['%file'], [DIRECTORY_SEPARATOR => '/']);
                 $ret['#abort'] = [