### 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 = CONSTANT;
		}
	};
	struct ContinueNode : public Node {
		ContinueNode() {
			type = CONTINUE;
		}
	};
	struct DictionaryNode : public ExpressionNode {
		struct Pair {
			ExpressionNode *key = nullptr;
			ExpressionNode *value = nullptr;
		};
		Vector<Pair> elements;
		enum Style {
			LUA_TABLE,
			PYTHON_DICT,
		};
		Style style = PYTHON_DICT;
		DictionaryNode() {
			type = DICTIONARY;
		}
	};
	struct ForNode : public Node {
		IdentifierNode *variable = nullptr;
		ExpressionNode *list = nullptr;
		SuiteNode *loop = nullptr;
		ForNode() {