Hi @isaluthy,
Can you verify what version of OJS you’re using?
Customizing the use of submission IDs could. be problematic, as OJS is very reliant on them and customizing them may have some unintended consequences. Please see the forum post here: OJS Auto Generated Submission ID number
If you’d still really like to customize them in full knowledge of the fact that it could create issues, let me know, and I’ll see if one of our developers can make suggestions for how to go about this.
-Roger
PKP staff