Autoupgrade

Hi

We have 12.1.4 SEP and clients are 11.17 SEP we want to upgrade with autoupgrade feature, if we assign 32 bit package during autouprade feature to one of SEP group which also has 64-bit clients then what will happen. Does package try to installed on 64bit client and failed? And how we handle this scenario where group has both 32 bit and 64 bit clients and want to upgrade with autoupgrade.

Thanks