diff --git a/spark/dl/src/main/scala/com/intel/analytics/bigdl/dllib/zooKeras/metrics/AUC.scala b/spark/dl/src/main/scala/com/intel/analytics/bigdl/dllib/zooKeras/metrics/AUC.scala
index c3cc0e62e9b..61d61ebcfb3 100644
--- a/spark/dl/src/main/scala/com/intel/analytics/bigdl/dllib/zooKeras/metrics/AUC.scala
+++ b/spark/dl/src/main/scala/com/intel/analytics/bigdl/dllib/zooKeras/metrics/AUC.scala
@@ -131,15 +131,15 @@ class AUC[T](thresholdNum: Int = 200)(implicit ev: TensorNumeric[T])
   override def apply(output: Activity, target: Activity):
   ValidationResult = {
     val _output = if (output.asInstanceOf[Tensor[T]].dim() == 2) {
-      output.asInstanceOf[Tensor[T]].squeeze(2)
+      output.asInstanceOf[Tensor[T]].clone().squeeze(2)
     } else {
-      output.asInstanceOf[Tensor[T]].squeeze()
+      output.asInstanceOf[Tensor[T]].clone().squeeze()
     }
 
     val _target = if (target.asInstanceOf[Tensor[T]].dim() == 2) {
-      target.asInstanceOf[Tensor[T]].squeeze(2)
+      target.asInstanceOf[Tensor[T]].clone().squeeze(2)
     } else {
-      target.asInstanceOf[Tensor[T]].squeeze()
+      target.asInstanceOf[Tensor[T]].clone().squeeze()
     }
     require(_output.dim() <= 2 && _target.dim() <= 2,
       s"${_output.dim()} dim format is not supported")