How to Change clause numbering which already approved and in Active status

Summary:

Our Client is having clauses which are already created and approved in system. Now they want to change Numbering for the each clause as it is getting defaulted on Contract PDF. Example: First clause is create with Number 1. Second is created with Number 2. Both are approved and active. Can we change number for first clause as 2 and for second clause as 1 ?

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