Promote a requirement as "is a dependency of" instead "Relates to"

Sometimes a requirement needs to be done one sprint before the related feature. So we need to promote it as a feature. The relationship between the new feature and the previous one is created as RELATES TO. This is a problem, as Gantt chart shows only dependency arrows, I need to delete the RELATES TO relationship and create a new one for every feature in this scenario. It would be great if I can configure the relationship when I create a Feature from a requirement, it would save me a LOT of time, every sprint.