Why ticket number ID's are skipping in Project?

Charlotte Bish_gf8mtd

We have a Software Project in Jira which when you go to 'create a new ticket' but then discard i.e. do not submit the creation, it still seems to count the ticket ID as used somewhere in the backend. 

i.e. - I go to create a new ticket (lets say it should be ID-30 based on next numeric ticket) but then discard the ticket. Then I go to create a new ticket and do complete it, I will then see ID-31 and ID-29. The initiated but discarded ID-30 is taken but not searchable? 

We do not see this with other Jira Software projects and wondered if someone can help understand what setting may be doing this?  

Tom Lister_fo1j4e

Hi

This is a database behaviour. The issue creation is taking the next available number in a sequence. If you then don't complete the process the id cannot be returned.

This is common practice but arguably this could/should be done as late as possible in the issue creation. But this doesn't appear to be the case.