In the netherlands there is an obligation to have consecutive invoice numbering for the tax authority audits. In LSMB it is easy to have gaps in the numbering I noticed. For example when deleting invoices from the approval/draft menu. Maybe Erik can comment on this how to prevent or how to comply with regulations that one cannot end up with holes in the invoice numbering.
You can have gaps in the numbering provided you can prove why these gaps. But indeed prevent is better than cure
affects 1.3 but only fixed for 1.4
https://github.com/ledgersmb/LedgerSMB/pull/546