diff --git a/src/Parsers/ASTAsterisk.cpp b/src/Parsers/ASTAsterisk.cpp
index 1ffbb85da7c..7e872e944bd 100644
--- a/src/Parsers/ASTAsterisk.cpp
+++ b/src/Parsers/ASTAsterisk.cpp
@@ -8,6 +8,7 @@ namespace DB
 ASTPtr ASTAsterisk::clone() const
 {
     auto clone = std::make_shared<ASTAsterisk>(*this);
+    clone->children.clear();
 
     if (expression) { clone->expression = expression->clone(); clone->children.push_back(clone->expression); }
     if (transformers) { clone->transformers = transformers->clone(); clone->children.push_back(clone->transformers); }