Maybe try putting Classic Guitar in the negative prompts -- does MJ do negative prompts? -- and see if it helps. I have been trying to get some doggos as spy movie characters but I think the original prompt was for MidJourney as Stable Diffusion cannot quite seem to get there. Made some fine puppers in tuxedos but closest to the prompt was this one.:

"The name is Woof. James Woof."

Original Prompt: A spy dog character wearing a tuxedo, sitting in a bar holding a Martini glass with a smug look

That gave me dogs but no drinks. Didn't get close until I changed it up a bit.

Modified Prompt: A spy dog character wearing a tuxedo and sitting in a casino bar with a Martini glass, smug, dapper, James Bond style

Negative Prompt Used With Both: out of frame, off camera, poorly drawn face, bad anatomy, ugly, clones, duplicates, missing limbs, extra limbs, extra tails, watermark, signature, words, logos, stamps, cards