How to merge liability (accounting class) when distribution's description is different ?

Dear Support Team,

EXAMPLE 1 :

An invoice which have 1 line and 3 distributions (NOTE : All the 3 distribution's description is DIFFERENT ) when we ran create accounting on DRAFT mode following Subledger Journal Entry Lines generated :

Accounting Class               DR          CR

Item Expense                    100

Item Expense                    100   

Item Expense                    100

Liability                                             100

Liability                                             100

Liability                                             100

EXAMPLE 2 :

Same scenario as mentioned above BUT the distribution's description is SAME following Subledger Journal Entry Lines generated :

Accounting Class               DR          CR

Item Expense                    100

Item Expense                    100   

Item Expense                    100

Liability                                             300

We have a requirement when the distribution's description is DIFFERENT the Subledger Journal Entry Lines should create the accounting as mentioned in the EXAMPLE 2 i.e Liability Account should be merged.