PKX/TrinityCore — comment on commit 64e21f76bb2fd210783d4696e3d2414106f82503
File: src/server/game/Spells/SpellMgr.cpp line 3483
By tobmaps:

Did you tested without it? For me it worked fine when i used 50720 with linked 68066 (through spell_linked_spell) to it on 4 months old rev without any additional changes. And as you can see in isSingleTargetWith the text "// TODO - need better check" should told you something ;)