People don’t want to discuss their failures but that is such a backward way of thinking. If you don’t observe and evaluate your shortcomings, there is no way to ensure that you will make a better decision when the problem arises again. Failure in itself is not true failure. Fear of acting on failure, however, is toxic and will overcome your professional progress. Stop making the same mistakes over and over again. Realize that you made a mistake. Address it (with your team if it was a team effort). Move forward with the knowledge of how it can be handled differently if the situation presents itself again.
Make professional development a priority.