Comment 1 for bug 684409

This was done by design and while there are indeed corner cases where forcing an entry without a bug would be useful, we preferred to consistently enforce this rule.

Things you could do though:
 - Invalidate the image even though it doesn't have a failed result (yeah, I know sub-optimal)
 - Use the API to log a result without a bug (as the API is the only case where you can actually do it, used by automated testing)
 - Ask an admin to enter an entry without a bug for you (as we can bypass the test)