Rollover functionality allows users to reuse an existing Reference Number even though the Enforce Uniqueness flag is checked for the Reference Number Qualifier. When the Rollover function is activated from the List of Reference Number Qualifiers, qualifying reference numbers attached to this qualifier will moved to a mirrored Reference Number Qualifier. This mirrored Reference Number Qualifier will not enforce reference number uniqueness. The reference numbers that have been rolled over will then be available for re-use.