delete negative prompt if base model is flux

src/routes/api/generate/+server.ts

@@ -33,9 +33,14 @@ export async function POST({ request, cookies } : RequestEvent) {
     },
     select: {
       instance_prompt: true,
+      base_model: true,
     }
   })
 
+  if (model?.base_model === "black-forest-labs/FLUX.1-dev") {
+    delete generation.negative_prompt
+  }
+
   const response = await fetch(process.env.SECRET_INFERENCE_API_URL + "/models/" + generation?.model?.id, {
     method: "POST",
     headers: {