TypeError: aiogram.dispatcher.router.Router.emit_startup() got multiple values for keyword argument 'bot'

[arynyklas]

Expected Behavior

Successful startup of Dispatcher.start_polling

Current Behavior

TypeError: aiogram.dispatcher.router.Router.emit_startup() got multiple values for keyword argument 'bot'

Steps to Reproduce

Please provide detailed steps for reproducing the issue.

1. dispatcher.start_polling(bot)

Failure Logs

Traceback (most recent call last):
  File "...lib\site-packages\aiogram\dispatcher\dispatcher.py", line 519, in start_polling
    await self.emit_startup(bot=bots[-1], **workflow_data)
TypeError: aiogram.dispatcher.router.Router.emit_startup() got multiple values for keyword argument 'bot'

[JrooTJunior]

Did you pass the "bot" key into dispatcher.workflow_data?

With described scenario in the "Steps to reproduce" section it can't be reproduced, but if you set manually dispatcher.workflow_data["bot"] = bot this error can be caused.

[Olegt0rr]

It also may looks like a

dispatcher["bot"] = ...

Since Dispatcher has:

def __setitem__(self, key: str, value: Any) -> None:
    self.workflow_data[key] = value