### 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 = SELF;
		}
	};
	struct SignalNode : public Node {
		IdentifierNode *identifier = nullptr;
		Vector<ParameterNode *> parameters;
		HashMap<StringName, int> parameters_indices;
#ifdef TOOLS_ENABLED
		String doc_description;
#endif 
		SignalNode() {
			type = SIGNAL;
		}
	};
	struct SubscriptNode : public ExpressionNode {
		ExpressionNode *base = nullptr;
		union {
			ExpressionNode *index = nullptr;
			IdentifierNode *attribute;
		};
		bool is_attribute = false;
		SubscriptNode() {
			type = SUBSCRIPT;
		}
	};
	struct SuiteNode : public Node {
		SuiteNode *parent_block = nullptr;
		Vector<Node *> statements;
		struct Local {
			enum Type {