Change target

I hope I’m writing into the right category.
I’m running OpenVAS in Kali Linux and I did a mistake in target definition (defining multiple exclude hosts with a space as a separator instead of a comma). Unfortunately I can not change in OpenVAS WebUI the target definition exclude host list as soon there is a task assigned.

Is there a way to change it in the database without the UI?
I really would like to avoid removing the task and report only to fix my mistake.