Existing viewpoint/dimension but Node types of pointing to different dimension

I am trying to repoint node types on a viewpoint to sort the nodes in alphanumeric order, the viewpoint's assigned node types are pointing to a different dimension. I tried recreating and replacing with new nodes types pointing to the expected dimension and its saying since its pointing to different a dimension I'm not allowed to add. How can i make this repoint successful? or unbound the existing node types to where i can add the new ones carry the correct dimension successfully?