Serial Number edit

Hi there! Any help out there with serial number edit. Two items were registered with same serial number due to system bug causing stock recon imbalance. Support says this was caused by a system bug, but they are not providing any solution. Any idea how to resolve this?
“The serial nos …in-warded two times, using stock entries … There was a bug in the last version due to which you were able to received the same serial nos two times. Now due to this the active serial no count is not matching with the available qty.”