### 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
StringName class_name;
									if (base.type.kind == GDScriptDataType::NATIVE) {
										class_name = base.type.native_type;
									} else {
										class_name = base.type.native_type == StringName() ? base.type.script_type->get_instance_base_type() : base.type.native_type;
									}
									if (ClassDB::class_exists(class_name) && ClassDB::has_method(class_name, call->function_name)) {
										MethodBind *method = ClassDB::get_method(class_name, call->function_name);
										if (_can_use_ptrcall(method, arguments)) {
											
											gen->write_call_ptrcall(result, base, method, arguments);
										} else {
											
											gen->write_call_method_bind(result, base, method, arguments);
										}
									} else {
										gen->write_call(result, base, call->function_name, arguments);
									}
								} else if (base.type.has_type && base.type.kind == GDScriptDataType::BUILTIN) {
									gen->write_call_builtin_type(result, base, base.type.builtin_type, call->function_name, arguments);
								} else {
									gen->write_call(result, base, call->function_name, arguments);
								}
								if (base.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
									gen->pop_temporary();
								}
							}
						} else {
							_set_error("Cannot call something that isn't a function.", call->callee);