### 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
gen->write_end_jump_if_shared();
						}
					}
					if (!info.is_named && info.key.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
						gen->pop_temporary();
					}
					if (assigned.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
						gen->pop_temporary();
					}
					assigned = info.base;
				}
				bool known_type = assigned.type.has_type;
				bool is_shared = Variant::is_type_shared(assigned.type.builtin_type);
				if (!known_type || !is_shared) {
					
					
					if (assign_class_member_property != StringName()) {
						if (!known_type) {
							gen->write_jump_if_shared(assigned);
						}
						gen->write_set_member(assigned, assign_class_member_property);
						if (!known_type) {
							gen->write_end_jump_if_shared();
						}
					} else if (is_member_property) {
						
						if (!known_type) {
							gen->write_jump_if_shared(assigned);
						}
						if (member_property_has_setter && !member_property_is_in_setter) {