### 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
#ifndef GDSCRIPT_PARSER_H
#define GDSCRIPT_PARSER_H
#include "gdscript_cache.h"
#include "gdscript_tokenizer.h"
#ifdef DEBUG_ENABLED
#include "gdscript_warning.h"
#endif
#include "core/io/resource.h"
#include "core/object/ref_counted.h"
#include "core/object/script_language.h"
#include "core/string/string_name.h"
#include "core/string/ustring.h"
#include "core/templates/hash_map.h"
#include "core/templates/list.h"
#include "core/templates/rb_map.h"
#include "core/templates/vector.h"
#include "core/variant/variant.h"
#ifdef DEBUG_ENABLED
#include "core/string/string_builder.h"
#endif
class GDScriptParser {
	struct AnnotationInfo;