The company said it won't be able to implement the strict social distancing rules and hygiene measures aboard the 164-passenger ship, which has been in service since 1993.
Had been scheduled to exit in 2021
Bremen had been scheduled to leave Hapag-Lloyd service in 2021, when newbuild Hanseatic Spirit arrives.
As announced last year, Bremen was sold to Scylla AG to operate as Seaventure for its VIVA Cruises brand.
Scylla is looking at possible early takeover
Scylla is currently investigating the option of an earlier takeover of the ship from Hapag-Lloyd Cruises, Scylla AG CEO Arno Reitsma told Seatrade Cruise News.
The ship is now alongside at Rostock.