I have multiple visa schengen from Netherlands as per my trip plan was to travel Amsterdam but then due to some changes i have to drop my travel to netherlands. Now if i need to travel to spain on same visa issued by netherlands state, can i travel or apply for spain schengen ? Thanks
Officially, your visa is supposed to be issued by the country in which you intend to spend the most time.
But look at all the "related questions" (links on the right). For example, Not going to the Schengen country that issued your visa because of genuine reasons