Saving Launchpad in Transport Request

Hello Experts,

I have created the Launchpad with Role ZESS and Menu ZMENU and now trying to save this in transport request , for this I have saved the Launchpad in namespace - /0CUST.

Now When I go to Menu -> Launchpad-> Transport  and try to give the Package name in which I want to save the Launchpad  I get the message -  ''/0CUST is not allowed as namespace''.

What need to be done to save it in  Package.

Thanks

Amol