Openly acknowledge the problems that you failed to solve in your research or writing. This increases your Trustworthiness regarding your "positive" results.
This Efficient writing practice is reciprocal to the rule 8 of Analytical reading: find out the questions that the author has actually answered (and what are the answers = solutions) and the questions they failed to answer.
Publishing negative results is Openness. It is to ‣ and to Share vulnerability. ‣.
Publish negative experiment results when practicing ‣ approach.
More generally, ‣.