This release belongs to the already end-of-life GVM-9 (GVM-9 (end-of-life, initial release 2017-03-07) - Greenbone Community Edition - Greenbone Community Forum).
Updating to the more recent and current stable releases GVM-10 (end-of-life, initial release 2019-04-05) - Greenbone Community Edition - Greenbone Community Forum or GVM 11 (end-of-life, initial release 2019-10-14) - Greenbone Community Edition - Greenbone Community Forum might already improve / solve this.