Question about Database static URL

I have a website which has two databases/collections of graduate details for this year & last year’s graduates. At the end of each academic year last year’s graduates database is deleted & the current year graduate’s details gets moved to last yea’s database.

I would like to name the collections “graduates20” “graduates21” & so on. But when I create the collections, Wix uses “graduates-1” “graduates-2” in the static part of the URL name. Even if I create a collection called “grad2020” it still uses “graduates-3” as the static part of the URL.

Just to add further confusion - in the “grad2020” collection I see two link fields created automatically in this collection called “Student (number)” - one has the fieldkey “graduatesStudentNumber” but the row entries are “/graduates-1/d20124069”

The second field automatically created has the fieldkey “graduatesStudentNumber-1” but the row entries are “/graduates-3/d20124069”

All very confusing!!
Has anyone encountered this scenario before?

Is there any way to control the name used in the static part of the URL?

This is sorted - it was being caused by me exporting a CSV file of the collection & importing it into a new collection - those fields came in on the import