Error 'mappingproxy' object does not support item assignment when collect SQL Databases

### Describe

Error occurred when collecting `SQL Databases` with this error msg.
```
2023-08-01T23:00:22.015Z [ERROR] 11111111eb1xxx19595ca1501be6eexx    (database_manager.py:176) [list_instances]  'mappingproxy' object does not support item assignment xxxxxxxxxxxxx
```