### 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
is_member = true;
						is_static = false;
						GDScript::MemberInfo &minfo = codegen.script->member_indices[var_name];
						setter_function = minfo.setter;
						has_setter = setter_function != StringName();
						is_in_setter = has_setter && setter_function == codegen.function_name;
						member.mode = GDScriptCodeGenerator::Address::MEMBER;
						member.address = minfo.index;
						member.type = minfo.data_type;
					} else {
						
						GDScript *scr = codegen.script;
						while (scr) {
							if (scr->static_variables_indices.has(var_name)) {
								is_member = true;
								is_static = true;
								GDScript::MemberInfo &minfo = scr->static_variables_indices[var_name];
								setter_function = minfo.setter;
								has_setter = setter_function != StringName();
								is_in_setter = has_setter && 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;
						}
					}
				}
				GDScriptCodeGenerator::Address target;