https://www.ibm.com/support/pages/apar/PI61756
PI61756: HWKEYTOOL -GENSECKEY -EXISTINGLABEL SOMETIMES REQUIRES (BUT DOESNOT ACCEPT) -KEYSIZE
hwkeytool -genseckey -existinglabel sometimes fails because keysize is needed. But hwkeytool -genseckey -existinglabel
sometimesrequiresaccept