### 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
PT_LITERAL,
			PT_EXPRESSION,
			PT_BIND,
			PT_ARRAY,
			PT_DICTIONARY,
			PT_REST,
			PT_WILDCARD,
		};
		Type pattern_type = PT_LITERAL;
		union {
			LiteralNode *literal = nullptr;
			IdentifierNode *bind;
			ExpressionNode *expression;
		};
		Vector<PatternNode *> array;
		bool rest_used = false; 
		struct Pair {
			ExpressionNode *key = nullptr;
			PatternNode *value_pattern = nullptr;
		};
		Vector<Pair> dictionary;
		HashMap<StringName, IdentifierNode *> binds;
		bool has_bind(const StringName &p_name);
		IdentifierNode *get_bind(const StringName &p_name);
		PatternNode() {