### 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
locals_indices[p_local->identifier->name] = locals.size();
			locals.push_back(Local(p_local, p_source_function));
		}
		void add_local(const Local &p_local) {
			locals_indices[p_local.name] = locals.size();
			locals.push_back(p_local);
		}
		SuiteNode() {
			type = SUITE;
		}
	};
	struct TernaryOpNode : public ExpressionNode {
		
		ExpressionNode *condition = nullptr;
		ExpressionNode *true_expr = nullptr;
		ExpressionNode *false_expr = nullptr;
		TernaryOpNode() {
			type = TERNARY_OPERATOR;
		}
	};
	struct TypeNode : public Node {
		Vector<IdentifierNode *> type_chain;
		TypeNode *container_type = nullptr;
		TypeNode() {