[exceptions] only create discord thread in except block if thread doesn't already exist; post inside either way (addresses an earlier bug)

app.py

@@ -420,7 +420,8 @@ async def deepfloydif(ctx, *, prompt: str):
             
         except Exception as e:
             print(f"Error: {e}")
-            thread = await ctx.message.create_thread(name=f'Posting Error')
+            if thread is Null:
+                thread = await ctx.message.create_thread(name=f'Posting Error')
             await thread.send(f"{ctx.author.mention} Encountered error while posting combined image in thread.")
             await fullqueue(e, thread)  
             await ctx.message.remove_reaction('<a:loading:1114111677990981692>', bot.user)
@@ -429,7 +430,8 @@ async def deepfloydif(ctx, *, prompt: str):
     #deepfloydif try/except
     except Exception as e:
         print(f"Error: {e}")
-        thread = await ctx.message.create_thread(name=f'deepfloydif Error')
+        if thread is Null:
+            thread = await ctx.message.create_thread(name=f'deepfloydif Error')
         await thread.send(f"{ctx.author.mention} Overall error with deepfloydif.")
         await fullqueue(e, thread)  
         await ctx.message.remove_reaction('<a:loading:1114111677990981692>', bot.user)