diff --git a/src/DDTrace/OpenTelemetry/Span.php b/src/DDTrace/OpenTelemetry/Span.php
index e43bb713eb..9f1b5d8461 100644
--- a/src/DDTrace/OpenTelemetry/Span.php
+++ b/src/DDTrace/OpenTelemetry/Span.php
@@ -59,8 +59,6 @@ final class Span extends API\Span implements ReadWriteSpanInterface
 
     private string $operationNameConvention = "";
 
-    private string $uniqueIdentifier = "";
-
     private function __construct(
         SpanData $span,
         API\SpanContextInterface $context,