Good morning all,
I am new here, and I hope I am in the right section of the site for my question...

I would like to have at least 2 sequences for sale orders which will be used indifferently in invoicing process.

In example I would have, for the same customer, in the same month, the following transportation documents:
- SO002; SO006; SO011
- DDT001; DDT006.

Now I need to generate the invoice with
Source: SO002, SO006, SO011, DDT001, DDT006

I tried to manually duplicate the sale.order Sequence field and activate the first or the second as I need.

This way works but it is a little bit complicated.... There are any other way/extension to install to do this in a simplest way?

Thank you very much for the help!