Over a year ago, a story ID request was asked, about a lone man manning some sort of space station. I answered it, and even though my guess wasn't the actual story the querant was looking for, it helped them enough to figure it out themselves.
Which is great!
They accepted not their own self-answer, but my answer, since that helped them the most.
Which is fine, too.
I then added a note to my answer, pointing to the correct answer. I didn't want to see my incorrect although helpful answer up voted too much.
While this answer has been graciously accepted by the OP, it was not the actual story they were looking for. That was Halfway House by Robert Silverberg, as evidenced by their own answer.
This all happened on the same day.
Recently, the note pointing to the correct answer was removed from my answer. The editor pointed to several discussions on meta, most notably one about adding in such a header as I had done.
Still, I thought it only fair my incorrect but accepted answer should point to the correct one, so I added the note back, this time as a footer.
It was removed again.
Now I agree we shouldn't delete incorrect story ID answers, as they can help other users find similar stories and help prevent the same wrong answer being given over and over.
I also agree we shouldn't change an existing answer too much, whether accepted or not.
And I agree we should let the votes do their job on incorrect answers. However, I would like to help users cast informed votes. Therefore, I'd like to add the information about my answer's (in-)correctness to the answer somewhere. I have done this before occasionally on incorrect story ID answers of mine, to help point other users in the right direction.
The main difference with the previous discussion about adding such a header, is that this concerns my own answer. I'm not "stealing reputation" from anyone but myself.
Can I be allowed to add a note to my own incorrect story ID answer, accepted or not, to point out why it is incorrect?
One suggestion was to put it in a comment. I think that's a suboptimal solution, since comments should be ephemeral. There's no guarantee for it to remain.
Of course we could try to get the querant to accept the correct answer. This has been tried. But accepting answers is their privilege, and they feel my incorrect answer helped them the most.
Note that my question is strictly about answers to story-identification questions, where an incorrect answer serves as useful information for other users.
Also note that I'm only asking about doing this with one's own answer.