project builder giving error CJ 654 (information message)

Hello Expert,

could anyone suggest solution on occuring new issue as we have project whether some of wbs is locked so when anyonce create a milestone or other wbs project builder produce information message as class CJ* & number 654. its standard information message i want ot avoid this like it shold not come at the time of saving project .

this is on urgent basis so provide your input thanks in advance.

Regards,

Sanjeev