Hi Bharti,
I'm not 100% sure, what you've done:
The HUs Information is normally replicated back from EWM to ECC during the GI posting. If that is the case, you should be able to cancel the GI posting (VL09) and also do the cancel picking in EWM (/SCWM/CANCPICK).
According to your description: have you changed something in Debugger?
Best regards,
Matthias