Power Bi Data modelling - How to create a product lookup table for like for like sales

[Anonymous]

Hi

I am failry new to Powerbi, and I would appreciate a little help please. I have a situation where I need to create a report that will show like for like sales per product of the last two years. In itself this is not a big issue, my issue is that products tend  to be relaunched (same product) but under a new product id. So matching Like for sales by product id over a period will fail, due to a product name change.  I need to create a lookup table but I am not sure how to do it and reference it . It Might also be that some product id s do not change (so no alias) would be needed, example 

These  two tables are linked by product id,

Data example 

Sales 2022                                 Sales 2023

productid                                  Product ID

10221              alias                   8765

87986             alias                    9897

In this simplified case, comparing the two products on a year-week basis will fail.

I would really appreciate any kind help you could offer please

Thank you