How to make a custom property unique?

**This post was created as part of a How to Service Request (SR)

Release:

22.1.6

Summary of the question:

We have a business requirement for a custom SKU property to be unique.

So one of the SKU properties for example the BAR Code needs to be unique, but there are no settings to do that. What can be done to achieve for a custom SKU property to be unique?

Supporting Documents if any:

[None]