I'm already using 3.8.4 yet we're having major issues with duplicate auto-numbers. At first, we encountered it on import. Then later, we have also encountered it on the UI when creating a new record. Our end-users are very strict when it comes to these auto-numbers and we need immediate solution as it affects their business process.
I already checked a solution in a related post but would it be better if it'll just be plain configuration? I checked the 'Do not allow duplicates option' but it doesn't seem to work. We would appreciate your prompt response.