Hi Mario,
Can we upgrade SVI to kernel 7.21_EXT and stay with kernel 7.00 on TES and PRO without problems about transport of object from development to the other systems ?
Having different kernel release will not create problems with transports.
As best practice you need to maintain same kernel levels across your landscape DEV, QAS, PRD and TEST.
Hope this helps.
Regards,
Deepak Kori