diff --git a/x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/plan/logical/Rename.java b/x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/plan/logical/Rename.java
index c609bfdae87e7..22cbbf13546e8 100644
--- a/x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/plan/logical/Rename.java
+++ b/x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/plan/logical/Rename.java
@@ -18,6 +18,7 @@
 import org.elasticsearch.xpack.esql.core.tree.Source;
 import org.elasticsearch.xpack.esql.expression.function.UnsupportedAttribute;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
 
@@ -47,7 +48,8 @@ public List<Alias> renamings() {
     @Override
     public List<Attribute> output() {
         // Normally shouldn't reach here, as Rename only exists before resolution.
-        List<NamedExpression> projectionsAfterResolution = ResolveRefs.projectionsForRename(this, this.child().output(), null);
+        var childOutput = new ArrayList<>(this.child().output());
+        List<NamedExpression> projectionsAfterResolution = ResolveRefs.projectionsForRename(this, childOutput, null);
 
         return Expressions.asAttributes(projectionsAfterResolution);
     }