Cell-linked dates do not go away when deleted from source sheet


I'm curious if others have found a solution to an issue I experienced today when linking cells. I had a date from one sheet (Schedule) feeding a second sheet as an inbound link. I deleted the date on the Schedule, but it did not delete on the second sheet. Are there any suggestions to resolve this issue without having to delete the link on the second sheet as well?

Thanks for any ideas you may have!