Michael Rensing has been told he can find himself a new club by Cologne after being displaced as the club's number one goalkeeper by Timo Horn.
The former Bayern Munich stopper has spent the last 18 months on the Cologne books, but following the club's relegation to the second division, he is now considered a luxury that they cannot afford to keep.
Nineteen-year-old Horn will instead keep goal next season, with Rensing free to find himself a new employer.
"It is important for us that this step is not seen as a decision against Michael Rensing, but rather as one pro Timo Horn," said the club's director of sport Frank Schaefer. "Michael Rensing has achieved a great deal for Cologne over the past 18 months through his performances and his presence.
"He has earned the respect of those involved in the Bundesliga and the support of the fans. Michael Rensing has been an important foundation of our team and, particularly last year, he made a telling contribution to us avoiding relegation.
"He has deserved our respect and our fairness and that includes being honest. Michael Rensing is not a number two - that is disrespectful to him."
Promoting former youth team goalkeeper Horn above Rensing is the first step in a revolution at the club following on from the sale of Lukas Podolski to Arsenal.
"Timo Horn is a great prospect from Cologne," added Schaefer on his club's official website. "He feels ready to take the next step and we also have faith in him.
"Timo Horn is the first face of the revolution. The bitter relegation opens the opportunity for a real revolution and we want to take this."