PLL synchronizer

Hi,

In my design I'm using 10MHz external clock. several (not all of them) blocks inside the code are needed 50MHz clock. In order to do that I created PLL from 10MHz to 50MHz and distribute to the relevant blocks.

Do I need to use synchronizer between the 50MHz output ports to the main 10MHz signals/ ports? If I do, is one synchronizer stage will be enough?

Thanks,

Idan