In what year was the album “Regen” released by Sero?

In what year was the album “Regen” released by Sero?: The album “Regen” was released in 2020 by Sero, featuring 14 tracks.
What is the most successful song from the album “Regen” by Sero?: “November” is the biggest hit from the album “Regen” by Sero.

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