Every time i do the part where I go to Los santos and order the rebel and and call mechanic for rebel it says you are already using your personal vehicle and he won't deliver it any tips? Gt Rise minnyons and this is what I do
1) get my friend on moot bike making sure he doesn't have his helmet on
2) get off the bike and go to my garage so I can get the car I want to dupe
3) go out of garage and kill myself
4) after I spawn I yell friend to get off bike thus making the duped car
5) I run to my car and get in it and buy rebel then I head to Los santos customs
6) I get 2 wheels in the Los santos customs and call my mechanic
7) after I see the rebel I want to order I hover over it and go in to Los santos customs and click it and it says you are already using your personal vehicle and the he won't deliver it

Please help!!!
-Ricky