A snapshot write over a settled run row that does not advance the row's
lifecycle, or one whose run provenance names another start than the stored
row's, settled or not: the stored row stands, and the writer (typically an
execution leg still running on another instance) is refused. Status 409, a
plain status field (see DoStatusError for why it is not a subclass).
A snapshot write over a settled run row that does not advance the row's lifecycle, or one whose run provenance names another start than the stored row's, settled or not: the stored row stands, and the writer (typically an execution leg still running on another instance) is refused. Status 409, a plain
statusfield (see DoStatusError for why it is not a subclass).