### 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
case GDScriptParser::Node::AWAIT: {
			const GDScriptParser::AwaitNode *await = static_cast<const GDScriptParser::AwaitNode *>(p_expression);
			GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(p_expression->get_datatype(), codegen.script));
			GDScriptParser::ExpressionNode *previous_awaited_node = awaited_node;
			awaited_node = await->to_await;
			GDScriptCodeGenerator::Address argument = _parse_expression(codegen, r_error, await->to_await);
			awaited_node = previous_awaited_node;
			if (r_error) {
				return GDScriptCodeGenerator::Address();
			}
			gen->write_await(result, argument);
			if (argument.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
				gen->pop_temporary();
			}
			return result;
		} break;
		
		case GDScriptParser::Node::SUBSCRIPT: {
			const GDScriptParser::SubscriptNode *subscript = static_cast<const GDScriptParser::SubscriptNode *>(p_expression);
			GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(subscript->get_datatype(), codegen.script));
			GDScriptCodeGenerator::Address base = _parse_expression(codegen, r_error, subscript->base);
			if (r_error) {
				return GDScriptCodeGenerator::Address();
			}
			bool named = subscript->is_attribute;
			StringName name;
			GDScriptCodeGenerator::Address index;
			if (p_index_addr.mode != GDScriptCodeGenerator::Address::NIL) {
				index = p_index_addr;
			} else if (subscript->is_attribute) {