If you create a node with specific content type and later you want to change that content type to another so that, that Node can be viewed in another Page or something like that then we need to change the existing content type to correct one.
There are different ways to do this done.
- Update Database directly, amending the content type to new one.
- Create a new content with intended content type and copy all the content of the node and then delete the old node.
- The most easiest way is to use the a simple module Node Convert