Review the following error traceback:

AnalysisException
<command-3293767849433948> in <module>
---> 1 display(df.select(3 * "heartrate"))
Traceback (most recent call last):
  File "/databricks/spark/python/pyspark/sql/dataframe.py", line 1692, in select
    jdf = self._jdf.select(self._jcols(*cols))
  File "/databricks/spark/python/lib/py4j-0.10.9-grc.zip/py4j/java_gateway.py", line 1304, in __call__
    answer = self.gateway_client.send_command(command)
  File "/databricks/spark/python/pyspark/sql/utils.py", line 123, in deco
    raise converted from None
AnalysisException: cannot resolve 'heartrateheartrateheartrate' given input columns: [spark_catalog.database.table.device_id, spark_catalog.database.table.heartrate, spark_catalog.database.table.mrn, spark_catalog.database.table.time]:
'Project ['heartrateheartrateheartrate]
+- SubqueryAlias spark_catalog.database.table
+- Relation[device_id#75L,heartrate#76,mrn#77L,time#78] parquet

Which statement describes the error being raised?