Example of using inpaint

1) Original image.

2) Adding an object: Select the area, enable latent noise, enter a new prompt, set Denoising strength to 0.95.

3) Fixing errors: This may take several steps, but I was lazy in this case.
Select the area, enable original, enter a prompt for error correction, set Denoising strength to ~0.85.
Repeat the last step until everything is fixed.

P.S. The last image is what you get if you generate everything at once.