The current action is not allowed on a constant parameter.
#2051 Compile-time error
The current action is not allowed on a constant parameter.
Additional Information
The 'X' action cannot be applied to Y 'Z'.",
where X is the name of the action, Y its type, and Z its name.
Recovery
Compilation continues but no compiled source code file will be saved.
Explanation
Constant parameters are different from other shelves, in the sense
that they have only an unchangeable value.