google-cloud-lib/src/main/java/com/streamsets/pipeline/stage/bigquery/destination/BigQueryTargetUpgrader.java
private void upgradeV1toV2(List<Config> configs) {
    configs.removeIf(config -> (config.getName().equals(IMPLICIT_FIELD_MAPPING_CONFIG) ||
        config.getName().equals(BIG_QUERY_IMPLICIT_FIELD_MAPPING_CONFIG)));
    configs.add(new Config(MAX_CACHE_SIZE, -1));
  }
private void upgradeV1toV2(List<Config> configs) {
    configs.removeIf(config -> (config.getName().equals(IMPLICIT_FIELD_MAPPING_CONFIG) ||
        config.getName().equals(BIG_QUERY_IMPLICIT_FIELD_MAPPING_CONFIG)));
    configs.add(new Config(MAX_CACHE_SIZE, -1));
  }
Remove implicit field mapping