[grymtn]

if you have auto increment in id, you can have 1 2 3 4 5 lets say. if you delete row 3 from database, next time you load vehicles there will be loaded 4 vehicles. no matter what you do. A vehicles database id number cannot be in game vehicle idbecause in case of creating cars with code, it will collide with your saved cars. DB id's are commonly used for saving vehicles again like after color change or if you put gun in it. so deleting a row doesnt affect your gameplay in anyway.

If you are interested in getting more info about it ask me in pm i will give you my skype so i can explain better