Edit logged time after imported logged time? How can we change the logged time without Work Log ?

[Valerie Fischer]

Hey there,

our problem is that we are not able to edit the logged time, because we imported this issue with an logged time of 1w 3d 3h, but the time log did not make it. So the edit function isn't accessable. 

to give you an idea: 
Original Estimate 1w 3d
Remaining 0
Logged time 1w 3d 3h 35m 
but the worklog is empty

Can anyone help? How can we change the logged time without Work Log ?