When configuring a integration, in my case VSTS, Aha does not allow you to disable/delete the start date. Additionally, it only has a "one way" from Aha>Integration.
Thank you for your idea. VSTS requires an iteration to have both a start and end date, or neither. So there are a couple options for mappings from Aha! The default is to include both start and end dates. The other option is to remove both the start and the end date mapping. This will allow you to send a release to VSTS and create a new iteration with no dates.