Deleting Racks in Siemens Hardware configuration

Hello Everybody

I have made my hardware configurations in Simatic Manager long ago but i have left the 4 racks in between empty, as you can see in the pic attached

Now when i compile my very small network (simatic & PC) using NetPro it gives me errors because these racks are empty

I tried to drag and drop the I & O racks to fill the empty ones & i noticed that the address range of each module change
my question is : if i used the drag & drop & saved changes ( to fill the empty racks), will the simatic manager automatically change the addressess of all my variables to suit the new address range and apply this in the program ?
or if i did that i will have to re right the new addresses in the symbol table ?

Please tell me as i do not want to change before i am sure of the result
Thank you

Try turning off "System default" for addresing.
The modules should then keep the address that you have assigned them?