what should i do to stop it??It is in 1988 gta notchback so i really need to keep it in good shape and i do not want to cover it in the wrong kind of material and do more damage later on .I have done a search and never found a clear answer .

I have a '91 convertible and mine is stuck in place fine - Unfortunately, the sun has faded all the RPO codes to the point that you can no longer read them. Fortunately, I copied all of the codes when I bought the car so I know what it has. Mine is mounted inside the console.

I would like to find someone who can make a reproduction sticker so I will be watching responses to your thread.
Have you considered removing it and putting it in a "documentation book" that you could display at shows?
Good luck.

I think It should stay in the car that's the way it was made.On my car the sticker is just starting to peel at the top corner i would like to know what to cover it with i.e. some sort of laminate or whatever to cover and protect it

I've faced this problem on both my GTAs. I just carefully removed both stickers and placed them in each car's owners manual for safekeeping. I made multiple copies of each label when I removed them for reference's sake.