diff --git a/pkg/planner/core/rule_join_reorder.go b/pkg/planner/core/rule_join_reorder.go
index 2dabaf7e77e4c..459556dfe07c3 100644
--- a/pkg/planner/core/rule_join_reorder.go
+++ b/pkg/planner/core/rule_join_reorder.go
@@ -316,7 +316,8 @@ func (s *joinReOrderSolver) optimizeRecursive(ctx sessionctx.Context, p LogicalP
 			proj := LogicalProjection{
 				Exprs: expression.Column2Exprs(originalSchema.Columns),
 			}.Init(p.SCtx(), p.SelectBlockOffset())
-			proj.SetSchema(originalSchema)
+			// Clone the schema here, because the schema may be changed by the projection optimization later.
+			proj.SetSchema(originalSchema.Clone())
 			proj.SetChildren(p)
 			p = proj
 		}