### 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
ParameterNode *parse_parameter();
	FunctionNode *parse_function(bool p_is_static);
	void parse_function_signature(FunctionNode *p_function, SuiteNode *p_body, const String &p_type);
	SuiteNode *parse_suite(const String &p_context, SuiteNode *p_suite = nullptr, bool p_for_lambda = false);
	
	AnnotationNode *parse_annotation(uint32_t p_valid_targets);
	bool register_annotation(const MethodInfo &p_info, uint32_t p_target_kinds, AnnotationAction p_apply, const Vector<Variant> &p_default_arguments = Vector<Variant>(), bool p_is_vararg = false);
	bool validate_annotation_arguments(AnnotationNode *p_annotation);
	void clear_unused_annotations();
	bool tool_annotation(const AnnotationNode *p_annotation, Node *p_target);
	bool icon_annotation(const AnnotationNode *p_annotation, Node *p_target);
	bool onready_annotation(const AnnotationNode *p_annotation, Node *p_target);
	template <PropertyHint t_hint, Variant::Type t_type>
	bool export_annotations(const AnnotationNode *p_annotation, Node *p_target);
	template <PropertyUsageFlags t_usage>
	bool export_group_annotations(const AnnotationNode *p_annotation, Node *p_target);
	bool warning_annotations(const AnnotationNode *p_annotation, Node *p_target);
	bool rpc_annotation(const AnnotationNode *p_annotation, Node *p_target);
	bool static_unload_annotation(const AnnotationNode *p_annotation, Node *p_target);
	
	Node *parse_statement();
	VariableNode *parse_variable(bool p_is_static);
	VariableNode *parse_variable(bool p_is_static, bool p_allow_property);
	VariableNode *parse_property(VariableNode *p_variable, bool p_need_indent);
	void parse_property_getter(VariableNode *p_variable);
	void parse_property_setter(VariableNode *p_variable);
	ConstantNode *parse_constant(bool p_is_static);
	AssertNode *parse_assert();
	BreakNode *parse_break();
	ContinueNode *parse_continue();