1992. In the case of the concealment, suppression or contestation of a will, or of any other difficulty, persons interested, who, without negligence or participation on their part, are disabled from effecting its registration within the delay prescribed by the preceding article, may nevertheless preserve their right by registering within the same delay a statement of such contestation or other impediment, and registering the will within 6 months after it or its probate has been obtained, or after the removal of the impediment.