diff --git a/locked-asset/proxy_dex/src/energy_update.rs b/locked-asset/proxy_dex/src/energy_update.rs
index 9bc045b6d..0c62e34f7 100644
--- a/locked-asset/proxy_dex/src/energy_update.rs
+++ b/locked-asset/proxy_dex/src/energy_update.rs
@@ -46,6 +46,10 @@ pub trait EnergyUpdateModule:
                 .get_token_attributes(token_id, token_nonce);
             energy.update_after_unlock_any(token_amount, attributes.unlock_epoch, current_epoch);
         } else if token_id == &old_locked_token_id {
+            if self.blockchain().is_smart_contract(user) {
+                return;
+            }
+
             let attributes = self.decode_legacy_token(token_id, token_nonce);
             let epoch_amount_pairs = attributes.get_unlock_amounts_per_epoch(token_amount);
             for pair in epoch_amount_pairs.pairs {