deleting rerun submission also deletes previous submission

The submission ID 26121 in the following screenshot is a rerun of submission 8330. The other submissions are children of the initial submission 8330 (see https://github.com/codalab/codabench/issues/1177). When deleting submission 26121, everything is deleted. If this is expected then the warning is not explicit enough… I deleted all submissions on a challenge while cleaning up reruns after a test session. There should be a way to delete a rerun without deleting the previous submission.