### Godot version

4.0.2.stable.mono

### System information

Windows 10 - 4.0.2.stable.mono - Any Renderer

### Issue description

In a script with an `@export` variable (with a non-default value), Godot will replace the first variable in the category with the same name. For example, if you're exporting a variable called "Vector", and the value is set to a non-default value, the first variable in the category called "Vector" will also be changed to the same value.

### Steps to reproduce

Attach said script to a node:
```
extends Node

@export var Vector: Vector2
@export_category("Vector")
@export var Var2: float = 1

func _process(delta):
	print(Var2)
```
When changing the value of the `Vector` export variable, the variable Var2 will contain the same value. This does not happen when the `@export_category` has a different name.

### Minimal reproduction project

N/A
scr = scr->_base;
				}
			}
			
			{
				GDScript *owner = codegen.script;
				while (owner) {
					GDScript *scr = owner;
					GDScriptNativeClass *nc = nullptr;
					while (scr) {
						if (scr->constants.has(identifier)) {
							return codegen.add_constant(scr->constants[identifier]); 
						}
						if (scr->native.is_valid()) {
							nc = scr->native.ptr();
						}
						scr = scr->_base;
					}
					
					if (nc) {
						bool success = false;
						int64_t constant = ClassDB::get_integer_constant(nc->get_name(), identifier, &success);
						if (success) {
							return codegen.add_constant(constant);
						}
					}
					owner = owner->_owner;
				}
			}