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Duplicate Sales invoice Doctype for Service invoice

Hi Team,

I’d want to Duplicate a Sales Invoice DocType for a New Invoice DocType (Service Invoice DocType).
I am able to duplicate Sales Invoices DocType without issue, but I am unable to submit New Invoices (Service Invoice) because autofill for quantity, rate, and amount does not work in the item field after adding the item.

Now, how can I duplicate a Sales Invoice DocType with all of its functionalities?

Regards,
Chandru