diff --git a/crates/engine/tree/src/tree/state.rs b/crates/engine/tree/src/tree/state.rs
index a10d26e3f27..08b2747a169 100644
--- a/crates/engine/tree/src/tree/state.rs
+++ b/crates/engine/tree/src/tree/state.rs
@@ -107,10 +107,6 @@ impl<N: NodePrimitives> TreeState<N> {
         self.blocks_by_number.entry(block_number).or_default().push(executed);
 
         self.parent_to_child.entry(parent_hash).or_default().insert(hash);
-
-        for children in self.parent_to_child.values_mut() {
-            children.retain(|child| self.blocks_by_hash.contains_key(child));
-        }
     }
 
     /// Remove single executed block by its hash.