diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/copier/LogicalPlanDeepCopier.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/copier/LogicalPlanDeepCopier.java
index 15ceb8c1f8bb35..c341ad20179533 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/copier/LogicalPlanDeepCopier.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/copier/LogicalPlanDeepCopier.java
@@ -153,7 +153,7 @@ public Plan visitLogicalAggregate(LogicalAggregate<? extends Plan> aggregate, De
                 .collect(ImmutableList.toImmutableList());
         LogicalAggregate<Plan> copiedAggregate = aggregate.withChildGroupByAndOutput(groupByExpressions,
                 outputExpressions, child);
-        Optional<LogicalRepeat<? extends Plan>> childRepeat =
+        Optional<LogicalRepeat<?>> childRepeat =
                 copiedAggregate.collectFirst(LogicalRepeat.class::isInstance);
         return childRepeat.isPresent() ? aggregate.withChildGroupByAndOutputAndSourceRepeat(
                 groupByExpressions, outputExpressions, child, childRepeat)