TODS-W408

Identical employee assignment appears twice

WARNING

Two rows in employee_run_dates.txt are exactly identical (same date, service, run, and employee). Multiple employees per run are fine; the same employee twice is usually an export bug.

Interpretation: permissive: the spec's 'Primary Key: *' is read as not forbidding an exact duplicate row, so this is a warning rather than an error (spec-questions #6).

Spec reference: https://tods-transit.org/spec/#employee_run_datestxt