How to generate a custom numeric sequence for Payment reference number during Payment Creation ?

Summary:

How to generate a custom numeric sequence for Payment reference number in Payments ?

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Hello Everyone,

We have a business use case wherein we would like to generate the Payment Reference number based on first number as '1000000' to avoid overlap with an existing legacy system. We are looking for options to configure/enable a sequence which can help generate 'Payment Reference' number as per our custom start number as '1000000'. Please advise as to how we can achieve the same ? As per some of the CC notes this is a system generated sequence and cannot be changed/updated.