hi Nsn,
you can panelize to save the cost, but you need to cut the board by yourself.
This is the rules of Panelizing:
•There should be no more than 5 sub-boards to fit the size.
•The sub-boards should only be separated by the silkscreen. Using any holes or slots to separate the sub-boards is not permitted.
the board outline is hard to cut,so your design don’t meet our panelizing rule.
regards,
dingding