توبه از کسب حرام و تاثیر آن بر نسل‌ها چگونه جبران می‌شود؟

Dear teacher, we have hadiths that say, “One who repents from sin is like one who has never sinned.”

If someone has raised children for many years on unlawful earnings and later repents, are they still like someone who has never sinned? Those unlawful earnings may have had an unconscious, negative effect that passes from generation to generation—and that effect may continue to circulate through the generations. How can this be made right? (Isn’t this like taking medicine after the patient has died?)
َّهِ الرَّحْمنِ الرَّحيمِ