The number on account move is generated from a sequence from the journal. It is a temporary number until the move is posted then it will receive a post number. Indeed this design has strong constraint as it prevent to modify the journal of a move once it is saved, see #8884. Also having such numbering per journal is not really useful and it is more an heritage of manual accounting on paper. So I propose to remove the number and the sequence on journal and to rename the post number to number. For the record name of draft move, I propose to use the `(id)` as we do for other documents (like invoice, sale etc.)