### 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
type = IDENTIFIER;
		}
	};
	struct IfNode : public Node {
		ExpressionNode *condition = nullptr;
		SuiteNode *true_block = nullptr;
		SuiteNode *false_block = nullptr;
		IfNode() {
			type = IF;
		}
	};
	struct LambdaNode : public ExpressionNode {
		FunctionNode *function = nullptr;
		FunctionNode *parent_function = nullptr;
		Vector<IdentifierNode *> captures;
		HashMap<StringName, int> captures_indices;
		bool use_self = false;
		bool has_name() const {
			return function && function->identifier;
		}
		LambdaNode() {
			type = LAMBDA;
		}
	};
	struct LiteralNode : public ExpressionNode {
		Variant value;
		LiteralNode() {