Warn if a Duplicate Number is
This option controls whether SliQ outputs a warning if a number,
e.g. an invoice number, has already been used.
In some countries, invoice numbers are reset to 1 at the
beginning of each year meaning that invoice numbers will
Note that if you wish to reset numbers to begin again at 1 you
will have to do this manually using the options below. SliQ does
not reset numbers automatically.