<p>According to <a href="http://meta.stackexchange.com/a/138460/189912">this MSO Q&A</a>, when a migration is rejected, answers which were migrated along with the question are deleted. The reason for this is that the answers are <a href="http://meta.stackexchange.com/a/126982/189912">returned to the source site</a>, where the question could potentially be reopened or sent elsewhere.</p>