I'm working with the new two-forms-per-portal userscript (@T89320, code). I used a button in my userspace to create a new idea GLAM_GHANA, which already exists.
- the wizard did not alert me that this title was taken (shown blue checkmark, not red x)
- I was able to create the new idea (button not greyed out)
- my new idea overwrote the existing idea: https://meta.wikimedia.org/w/index.php?title=Grants:IdeaLab/GLAM_GHANA&diff=11386545&oldid=11382580