### 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
virtual void set_datatype(const DataType &p_datatype) { datatype = p_datatype; }
		virtual bool is_expression() const { return false; }
		virtual ~Node() {}
	};
	struct ExpressionNode : public Node {
		
		bool reduced = false;
		bool is_constant = false;
		Variant reduced_value;
		virtual bool is_expression() const override { return true; }
		virtual ~ExpressionNode() {}
	protected:
		ExpressionNode() {}
	};
	struct AnnotationNode : public Node {
		StringName name;
		Vector<ExpressionNode *> arguments;
		Vector<Variant> resolved_arguments;
		AnnotationInfo *info = nullptr;
		PropertyInfo export_info;
		bool is_resolved = false;
		bool is_applied = false;
		bool apply(GDScriptParser *p_this, Node *p_target);
		bool applies_to(uint32_t p_target_kinds) const;
		AnnotationNode() {