Help me please! How can I chage the main quest marker to other place after complete the quest?

I’ve follow this tutorial series:

And create the radar, but I want to change the location of the Main Quest marker after reaching it, for example, to the next goal. How can I do it?

Use a “boolean” node, so if the quest is complete make the “boolean” to true, and the if itr is true the create next Quest marker on the map