contingent liability grang and joey

hi dear sir hope you are fine
q 1 = At the time of the business combination with Margy, Joey has included in the fair value of Margy’s identifiable net assets, an unrecognised contingent liability of $6 million in respect of a warranty claim in progress against Margy. In March 20X4, there was a revision of the estimate of the liability to $5 million. The amount has met the criteria to be recognised as a provision in current liabilities in the financial statements of Margy and the revision of the estimate is deemed to be a measurement period adjustment.

q 2- On 31 July 2008, Grange acquired a 100% of the equity interests of Fence for a cash consideration of $214 million. The identifiable net assets of Fence had a provisional fair value of $202 million, including any contingent liabilities. At the time of the business combination, Fence had a contingent liability with a fair value
of $30 million. At 30 November 2009, the contingent liability met the recognition criteria of IAS 37 ‘Provisions, Contingent Liabilities and Contingent Assets’ and the revised estimate of this liability was $25 million. The accountant of Fence is yet to account for this revised liability.

whats the diffrence between these two adjustment thanks in advance