Can't correct typos in time spent.

If I mistakenly log, for example, 6 days time spent instead of 6 hours, there is apparently no way to correct the error. I can't delete the log entry, I can't edit the log entry, I can't enter negative time in a new log entry to adjust the total.

I appear to be stuck with an issue that will report as 5 days and 2 hours more time spent than is true. This will be unacceptable to my manager, requiring an explanation by me to him, by him to his manager, etc.

Please give me an Edit Work Log Entry feature.

Thanks.