Add a valid time state key to an existing table

In my earlier days I was not aware of the Valid Time State Key functionality. So a table which should've implemented this functionality I built with code. There is no unique index and then on validateField I check that no overlap occurs (I also wrote code on update and insert to double check). Now my perfectionist side wants to change this table to a Valid Time State Table.

Basic logic tells me that this will not create any issues on client data, but I am still unsure.

I guess the safe method will be to live with this *primitive table I built........but if I really wanted to change it, am I correct to say that changing it to VTS will not create any issues? Assuming my code was correct in preventing FromDate..ToDate overlap.

Thanks for reading