I have found some instances where Verification Elements refer to LSE-61 requirements that no longer exist in LSE-61. For example, in the "Lower Level Requirement" field of LVV-175, it lists DMS-REQ-0071. In LSE-61, there is no DMS-REQ-0071, so this requirement should not be referenced in the MagicDraw model.
I am not sure how to systematically find instances like this, but we should try to do so if possible. Once we've identified them, these references to non-existent requirements should be removed.