I have seen this when an "05.md" file exists and has content. I have also seen this when the template to create journal note doesn't run properly for some reason. - i just copy the content out of "05.md" and delete it. Then I open another note (like 2022-10-04), do the C-S-i, to create 2022-10-05, then paste the content into the new note. This happens for me when the template somehow does not get applied - haven't taken time to understand why, because it only happened once or twice to me