Como generar alas en la espalda de forma correcta

Sometimes you have to play around with the prompt and where you place a particular detail.

I tried a few times with small variations to the prompt and got a lot of images showing wings behind the character.

Examples
The prompt below gave mixed results, mostly inaccurate:
"woman seen from behind with spread out wings growing from her back"

Got better results with: "woman with wings on her back" (included a style)

The image below was with the prompt: "wings on woman's back" (no style)


So my advice, keep experimenting and remember the order of your words can influence the result. Also, try keep your prompt simple.

For your issue, it is worth sharing the prompt you used so people responding here understand how you got to the image you posted. This will help with advice and if Adobe need to make changes to Firefly.