item spawners not working correctly after restart

### Minecraft Version

1.21.11

### Plugin Version

1.61

### 📌 Bug Description

when restarting server item spawners are not working no correct sell price and not getting the price from esgui premium

### ⚡ Steps to Reproduce

1. Start the server
2. Place a spawner
3. ...


### 📜 Logs or Errors (if applicable)

```shell

```