Sonarr trying to copy from wrong folder

Sonarr version (exact version) : 2.0.0.5344
Mono version (if Sonarr is not running on Windows) : 5.20.1.34
OS : Ubuntu 18.04.4 LTS
AppData directory /config
Startup directory /opt/NzbDrone
Debug logs : https://ufile.io/vjlwuncs
Description of issue :
Running Docker-Compose

  sonarr:
    container_name: sonarr
    restart: unless-stopped
    ports:
      - 8989:8989
    volumes:
      - /home/server/docker/sonarr:/config
      - /home/server/downloads:/downloads
      - /mnt/SeagateExternal/Series/:/tv
      - /mnt/Backup/Series/:/Series2/
    environment:
      - PUID=501
      - PGID=1000
      - TZ=Europe/Athens
      - UMASK_SET=022
    image: linuxserver/sonarr
    depends_on:
      - nzbget      
      - transmission
      - jackett
    links:
      - nzbget:nzbget
      - transmission:transmission

And file download works fine, the file is downloaded to
/downloads/completed/Series
But Sonarr fails to move it as it looks in

20-3-17 01:15:27.9|Error|DownloadedEpisodesImportService|Import failed, path does not exist or is not accessible by Sonarr: /data/completed/Series/Last Week Tonight with John Oliver (2014) S07E04 March 8 (1080p AMZN Webrip x265 10bit EAC3 2.0 - ArcX).mkv

So it looks inside /data/ instead of /downloads/

Where do I configure that?

Edit: Also not sure why its trying

20-3-16 22:23:17.9|Error|DownloadedEpisodesImportService|Import failed, path does not exist or is not accessible by Sonarr: /downloads/completed/Series/Last.Week.Tonight.with.John.Oliver.S07E05.1080p.WEB.H264-XLF

Sonarr have not added that file to either transmission nor nzbget, so not sure why it expects to find that file in that folder

/data/... is the path returned by your download client when Sonarr asks it where the file is.