I was pulling data from an S3 source using a Databricks Autoloader pipeline. Some files in the source contained bad characters, which caused the Autoloader to fail to load the data. These problematic files have now been removed from the source, but Databricks continues to complain about them. I want to reset the checkpoint to an earlier date to reprocess the data, but I didn’t explicitly specify a checkpoint location in the Autoloader configuration. Where is the default checkpoint location stored, and how can I reset it to a previous date?