Cancel Multiperiod accounting enabled Invoice

Hi

we have configured MPA in our subledger accounting method.

This is for business case of Rent paid in advance and amortize the expense as per the contract period. we need to know how to cancel the invoice when the contract is terminated midway

e.g.

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12 months 12000 rent

monthly amortization 1000

contract is terminated after 4 months of usage.

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How to meet this requirement.

thanks

Venkat