### 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
GDScriptCodeGenerator::Address call_base = is_static ? GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::CLASS) : GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::SELF);
					gen->write_call(GDScriptCodeGenerator::Address(), call_base, setter_function, args);
				} else if (is_static) {
					GDScriptCodeGenerator::Address temp = codegen.add_temporary(static_var_data_type);
					if (assignment->use_conversion_assign) {
						gen->write_assign_with_conversion(temp, to_assign);
					} else {
						gen->write_assign(temp, to_assign);
					}
					gen->write_set_static_variable(temp, static_var_class, static_var_index);
					gen->pop_temporary();
				} else {
					
					if (assignment->use_conversion_assign) {
						gen->write_assign_with_conversion(target, to_assign);
					} else {
						gen->write_assign(target, to_assign);
					}
				}
				if (to_assign.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
					gen->pop_temporary(); 
				}
				if (has_operation && assigned_value.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
					gen->pop_temporary(); 
				}
				if (target.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
					gen->pop_temporary(); 
				}
			}
			return GDScriptCodeGenerator::Address();