What was the error? If the member already had a record then you should use the Merge Duplicate Records option (in LCR select Membership > Merge Duplicate Records). If the record is for a child of record where permission was not given or for someone older who had not been baptized then you'll have to contact the global service center and ask them to delete the records.
A clerk can only merge records or cancel children of record who are 18 or over and never baptized.