Power 7/8 - LPAR has null desired_proc and desired_mem

Hi,

I am querying the HMC via commands to get the memory and cpu of the logical partitions.
I am using the command lssyscfg.

For many lpars which are in Running or Not Activated status,
the command returns null for desired_procs and desired_mem.

But i am unable to create a lpar with null desired_procs=null and/or desired_mem=null .
How did the lpars get desired_mem and desired_procs as null ?