### 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_call_self(temp, codegen.script->member_indices[identifier].getter, args);
						return temp;
					} else {
						
						int idx = codegen.script->member_indices[identifier].index;
						return GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::MEMBER, idx, codegen.script->get_member_type(identifier));
					}
				}
			}
			
			{
				GDScript *scr = codegen.script;
				while (scr) {
					if (scr->static_variables_indices.has(identifier)) {
						if (scr->static_variables_indices[identifier].getter != StringName() && scr->static_variables_indices[identifier].getter != codegen.function_name) {
							
							GDScriptCodeGenerator::Address temp = codegen.add_temporary(scr->static_variables_indices[identifier].data_type);
							GDScriptCodeGenerator::Address class_addr(GDScriptCodeGenerator::Address::CLASS);
							Vector<GDScriptCodeGenerator::Address> args; 
							gen->write_call(temp, class_addr, scr->static_variables_indices[identifier].getter, args);
							return temp;
						} else {
							
							GDScriptCodeGenerator::Address temp = codegen.add_temporary(scr->static_variables_indices[identifier].data_type);
							GDScriptCodeGenerator::Address _class = codegen.add_constant(scr);
							int index = scr->static_variables_indices[identifier].index;
							gen->write_get_static_variable(temp, _class, index);
							return temp;
						}
					}