TypeError: 'set' on proxy: trap returned falsish for property

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Hello, I am trying to create a simple relation but I am getting this very uninformative error.

This is the code:

```
let car = db.R.dispense('car');
car.brand = 'Brand';
car.model = 'Model';
car.year = 'Model';
car.chat_keyword= 'KWD';
try {await db.R.store(car);}catch (e) {console.log(e);}

console.log("Creating usercar model");
let usercar = db.R.dispense('usercar');
usercar.added_date = db.R.isoDate();
usercar.car = car;
try {await db.R.store(usercar);}catch (e) {console.log(e);}
```

Error:

```
TypeError: 'set' on proxy: trap returned falsish for property 'carId'
at Proxy. (C:\Users\Perroloco\Programming\node\evsyscheduler\node_modules\redbean-node\dist\bean.js:187:57)
at Generator.next ()
at C:\Users\Perroloco\Programming\node\evsyscheduler\node_modules\redbean-node\dist\bean.js:14:71
at new Promise ()
at __awaiter (C:\Users\Perroloco\Programming\node\evsyscheduler\node_modules\redbean-node\dist\bean.js:10:12)
at Proxy.storeTypeBeanList (C:\Users\Perroloco\Programming\node\evsyscheduler\node_modules\redbean-node\dist\bean.js:180:16)
at RedBeanNode. (C:\Users\Perroloco\Programming\node\evsyscheduler\node_modules\redbean-node\dist\redbean-node.js:126:24)
at Generator.next ()
at C:\Users\Perroloco\Programming\node\evsyscheduler\node_modules\redbean-node\dist\redbean-node.js:8:71
at new Promise ()
at __awaiter (C:\Users\Perroloco\Programming\node\evsyscheduler\node_modules\redbean-node\dist\redbean-node.js:4:12)
at RedBeanNode.storeCore (C:\Users\Perroloco\Programming\node\evsyscheduler\node_modules\redbean-node\dist\redbean-node.js:124:16)
at RedBeanNode. (C:\Users\Perroloco\Programming\node\evsyscheduler\node_modules\redbean-node\dist\redbean-node.js:116:35)
at Generator.next ()
at fulfilled (C:\Users\Perroloco\Programming\node\evsyscheduler\node_modules\redbean-node\dist\redbean-node.js:5:58)
```

Am I doing something wrong? thx

Start with the stack-trace locations in dist/bean.js around line 180 and redbean-node.js around lines 124-126, then reproduce the car/usercar relation example. Determine whether the reported proxy assignment is expected behavior or an error, and document the result or a focused fix with coverage for this relation case.

Written by the indexing model from the issue text.