diff --git a/dags/queries/generate_avro/contract_data.sql b/dags/queries/generate_avro/contract_data.sql
index 9fb7e60d..4c334e6b 100644
--- a/dags/queries/generate_avro/contract_data.sql
+++ b/dags/queries/generate_avro/contract_data.sql
@@ -7,7 +7,8 @@ options (
 as (
     select
         *
-        except (batch_id, batch_insert_ts, batch_run_date)
+        except (batch_id, batch_insert_ts, batch_run_date, asset_code)
+        , replace(asset_code, '\u0000', '') as asset_code
     from {project_id}.{dataset_id}.contract_data
     where
         true