Can I run automated appium iOS10 tests on iOS9 or lesser with out making any changes with appium 1.6.3

I had a doubt.I tried to run the tests which I automated on iOS9 using appium 1.4.13 on iOS10 using appium 1.6.3 and it is not working.

Do I need to automated all the testcases separately for iOS 9.3 or lesser and iOS10 or greater.

Is there any way if I automate the testcases on one iOS (assume either iOS9 or 10) it should work on all iOS versions?

Can some one please help me on this?