Is it good to use user-input as partition key value in DynamoDB

I have a partition key called pkey Is it good to have something like PRODUCT#GLS10 where GLS10 is the product skuCode (which is user input) as the sort key? Or, is it best practice to use UUID like PRODUCT#a8b8f5ca-9faf-44f8-b3a0-4faff82a282d?

Since skuCode is unique, I think it's gonna be alright or am I wrong?
P.S. I use adjacency list pattern for schema design