XF 1.4 Remove imported node permissions?


Well-known member
How can I remove user groups rights on imported nodes (from vBulletin)? Best would be an option "clear user group rights on this node" or similar.

Can this be done, just as if it would be a freshly created node? And most important, without the need to set anything for all single user groups?
I would like to quickly remove the "darker blue" permissions: