### 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 result_addr = codegen.add_temporary(temp_type);
			codegen.generator->write_binary_operator(result_addr, Variant::OP_EQUAL, p_type_addr, array_type_addr);
			codegen.generator->write_and_left_operand(result_addr);
			
			GDScriptCodeGenerator::Address array_length_addr = codegen.add_constant(p_pattern->rest_used ? p_pattern->array.size() - 1 : p_pattern->array.size());
			
			temp_type.builtin_type = Variant::INT;
			GDScriptCodeGenerator::Address value_length_addr = codegen.add_temporary(temp_type);
			Vector<GDScriptCodeGenerator::Address> len_args;
			len_args.push_back(p_value_addr);
			codegen.generator->write_call_gdscript_utility(value_length_addr, "len", len_args);
			
			temp_type.builtin_type = Variant::BOOL;
			GDScriptCodeGenerator::Address length_compat_addr = codegen.add_temporary(temp_type);
			codegen.generator->write_binary_operator(length_compat_addr, p_pattern->rest_used ? Variant::OP_GREATER_EQUAL : Variant::OP_EQUAL, value_length_addr, array_length_addr);
			codegen.generator->write_and_right_operand(length_compat_addr);
			
			codegen.generator->write_end_and(result_addr);
			
			codegen.generator->pop_temporary();
			codegen.generator->pop_temporary();
			
			GDScriptCodeGenerator::Address element_addr = codegen.add_temporary();
			GDScriptCodeGenerator::Address element_type_addr = codegen.add_temporary();
			
			for (int i = 0; i < p_pattern->array.size(); i++) {
				if (p_pattern->array[i]->pattern_type == GDScriptParser::PatternNode::PT_REST) {
					
					break;
				}