TypeError: error: Incompatible types in assignment (expression has type "Clan", variable has type "Optional[ForeignKeyFieldInstance[Clan]]")

[adambirds]

Describe the bug
Getting a type error when updating the ForeignKey field to a different clan on a Nullable Foreign Key Field instance.

To Reproduce

if await Clan.get_or_none(tag=clantag):
	clan = await Clan.get(tag=clantag)
	if await Player.get_or_none(name=playername):
		if await Season.active_seasons.all().exists():
			await ctx.send("Cannot move players between clans during an active season.")
		else:
			player = await Player.get(name=playername)
			if player.is_enabled():
				player.clan = clan
				await player.save()
				await ctx.send(
					f"Welcome @{playername} to the [{clan.tag}] {clan.name} Clan roster!"
				)
			else:
				player.clan = clan
				await player.save()
				await ctx.send(
					f"Welcome @{playername} to the [{clan.tag}] {clan.name} Clan roster!"
				)
	else:
		await Player.create(name=playername, clan=clan, enabled=True)
		await ctx.send(
			f"Welcome @{playername} to the [{clan.tag}] {clan.name} Clan roster!"
		)
else:
	await ctx.send(f"Clan {clantag} does not exist.")

Expected behavior
This shouldn't error as the code works fine and foreign key field gets updated fine.

Additional context
Add any other context about the problem here.