Modifying a proposition hierarchy Maintain your proposition hierarchy by removing obsolete or invalid product offers and their categories. Deleting unversioned propositions Delete a proposition or propositions in a group stored as data instance to remove obsolete or invalid product offers. Deleting versioned propositions Delete propositions in a group saved as decision data rules to remove obsolete or invalid product offers. Deleting a business issue or a group Remove a business issue or group that you no longer need in the propositions hierarchy. This action does not result in deleting the class that represents the business issue or group. It removes a given issue or a group from the proposition hierarchy context by changing the pyDecisioningItem custom field of the class from the Issue (for issue level classes) or Group (for the group level classes) to MarkedForDeletion.