Hi Ken,
May be previos i am not able to addressing the issue to all of you
but let me elaborate more on it as we have 5 wbs two are locked from them. so now logistic user want to create milestone/any other kind of changes and goiting for save system populated standard message CJ* & number 654.
above trick we have applied but result is not expected every time system populated messaged CJ* & number 654.
Even i have raised a OSS to SAP so meanwhile i was checking with you expert 
Regards,
Sanjeev