### 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
while (scr) {
											if (scr->static_variables_indices.has(var_name)) {
												is_member_property = true;
												is_static = true;
												const GDScript::MemberInfo &minfo = scr->static_variables_indices[var_name];
												member_property_setter_function = minfo.setter;
												member_property_has_setter = member_property_setter_function != StringName();
												member_property_is_in_setter = member_property_has_setter && member_property_setter_function == codegen.function_name;
												static_var_class = codegen.add_constant(scr);
												static_var_index = minfo.index;
												static_var_data_type = minfo.data_type;
												break;
											}
											scr = scr->_base;
										}
									}
								}
							}
							break;
						}
						n = static_cast<const GDScriptParser::SubscriptNode *>(n->base);
					}
				}
				
				
				GDScriptCodeGenerator::Address base = _parse_expression(codegen, r_error, chain.back()->get()->base);
				if (r_error) {
					return GDScriptCodeGenerator::Address();
				}
				GDScriptCodeGenerator::Address prev_base = base;