Sorry if this is a stupid question. I’m just not that good with the unreal engine. (I’m more into making music) 
I noticed that my uploaded content is out of date and that it needs to be updated.
I updated 1 of my music packs to version 4.26 to test it. This worked but I got an email from a buyer who asked if I could make the project compatible with 4.24. I looked into it and I noticed that the project I uploaded/updated is only compatible with 4.26 and no other version. (And maybe 4.25 but I don’t know why that is because I used version 4.26 to make the content)
I checked out some other content on the marketplace and noticed that a lot of them support engine version 4.21-4.26.
So I guess my question would be. How can I make sure that my content supports multiple engine versions? What is the best way of doing it? Or is have the highest engine version good enough?