GENERIC_INTERNAL_ERROR: Unknown object inspector category: UNION

All,

I recently updated an AVRO Schema. I have checked that the updates made to the schema are backward compatible; and they are. Next, I saved an avro file w/ the new schema to an s3 Bucket and created a crawler.

Please note that I have updated the crawler w/ the following configs:

• Update the table definition in the data catalog
• Update all new and existing partitions with metadata from the table
• Mark the table as deprecated in the data catalog

The crawler runs successfully and creates a table.

However, when I run an Athena table against the created table I get this issue:

GENERIC_INTERNAL_ERROR: Unknown object inspector category: UNION

I have checked Amazon Documentation related to GENERIC_INTERNAL_ERROR issue types; but there's nothing mentioned about this type of issue. Any ideas on how to resolve this?