Hi Satish,
First of all you need to have authorization to use "/h" T code to go to debug mode. If you have authorization, go to active data table in contents tab, give proper selections to display exact records(incorrect records), select the incorrect record by using glasses symbol , once displayed only that record(incorrect one). Give transaction code /h and execute, after that again hit 'enter' button. This will take you to the debug screen, there you need to change value of a field from 'show' to 'Edit' in code(do not remember what is that field to change in logic, some one can help from forum). You need to double click on that field, so that it will allow you to change it's value from 'show' to 'edit', after that press F8 it will take you to the record screen which is in editable mode. You can change the value and save it.
Thanks,
Vengal.