QM-Inspection Lot Specification changes

Dear Gurus,

We have maintained some specifications in the inspection plan.

during Delivery, Inprocess during process order relese Lot got generated with specifications maintained in the inspection plan.

Now user finds a problem in the specification, so he corrected in the inspection plan.

Is there any possibility of read again the master data for new specification for the already existing lot.

or is there any possibility of editing the inspection lot with new specification.

Thanks in advance,

Siva