Fieldtype int cannot be unique

1

i want int field type with unique value, but it throw some error

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2

same problem. Did you find a solution?

3

Still the same issue.

Student: Fieldtype Int for Roll Number cannot be unique

If I make it of type “Data”, then it can be unique, but not in the case of Int. Looks Odd.

or is there any valid reason for such a behaviour?