There is already a component named '<component name>'
Complete error message: Components must have unique names, and names must not be case-sensitive. A name also cannot conflict with the name of any component in an inherited class.
This error message arises when there has been a change to the name of a component in the Properties window.
To correct this error
- Ensure all component names are unique, are not case-sensitive, and do not conflict with the names of any components in the inherited classes.