### 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 = FOR;
		}
	};
	struct FunctionNode : public Node {
		IdentifierNode *identifier = nullptr;
		Vector<ParameterNode *> parameters;
		HashMap<StringName, int> parameters_indices;
		TypeNode *return_type = nullptr;
		SuiteNode *body = nullptr;
		bool is_static = false;
		bool is_coroutine = false;
		Variant rpc_config;
		MethodInfo info;
		LambdaNode *source_lambda = nullptr;
#ifdef TOOLS_ENABLED
		Vector<Variant> default_arg_values;
		String doc_description;
#endif 
		bool resolved_signature = false;
		bool resolved_body = false;
		FunctionNode() {
			type = FUNCTION;
		}
	};
	struct GetNodeNode : public ExpressionNode {
		String full_path;
#ifdef DEBUG_ENABLED
		bool use_dollar = true;
#endif
		GetNodeNode() {