How to open and find right nr. range i

In the middle in transaction "FP2P1" I am stucked I am asked to in order to open a number range.If I enter in message I get Check the number range for number range object FKK_P2P with transaction FPNP2P. Create the number range if it has not been created yet.

""

In which transaction I can do that?

How to find right nr. range i