As established routines and other forms of knowledge may prevent organizations to respond to changing situations, they need to learn how to break out of the old way of thinking and acting. While unlearning is among the most promising approaches to do so, there is only a limited understanding of the requirements for the effective design of unlearning support systems (USS). As part of a larger design research project, this research-in-progress paper reviews 41 articles on practical approaches for unlearning support and derives an initial catalog of 23 design requirements. Our work aims to guide designers in the implementation and operationalization of unlearning support.