That way Bayern Munich must immediately find a replacement for their goalkeeper considering the start of the season will also start soon and only 10 days away Bayern Munich will start their first game for the Bundesliga.
Maybe De Gea's option as a goalkeeper to replace the injured Manuel Neuer is also quite good because De Gea himself is a very good goalkeeper and had become a goalkeeper that was quite relied on by Manchester United before his contract expired.
Now De Gea has a free transfer status and makes it easier for Bayern Munich to propose and make a deal with De Gea even if it's only for one or two seasons.