DMS shows validation failed, but no records found on awsdms_validation_failures_v1

I am doing migration from Oracle to postgres. DMS migrated several tables without any issues, I am having issues with few tables on validation. Validation issues should be on awsdms_validation_failures_v1. But I do not find any records in this table. Please let me know how to get the data into awsdms_validation_failures_v1 .