Missing numers in consecutive order of Ticket.Id in mysql table Tickets

we noticed, that the values for id in table Tickets are not strictly
serially numbered.
About 8.000 tickets are in our database, about 30 ‘holes’ are detected.
We do not miss any tickets.
We’re just wondering if this is ‘normal’ behaviour or if we have to
throw a life belt :slight_smile:

Thank you very much,
Olaf Hamann