[Issue]: Changing backdrop order fails if backdrop on ro file system

[Shadowghost]

Please describe your bug

Changing backdrop order fails if backdrop on ro file system

Reproduction Steps

1. Have a series folder with backdrops in it on a readonly file system
2. Scan
3. Add backdrop manually or by external metadata source
4. try chaning backdrop order

Jellyfin Version

Master branch

if other:

No response

Environment

- OS: Linux
- Linux Kernel: -
- Virtualization: -
- Clients: -
- Browser: -
- FFmpeg Version: -
- Playback Method: -
- Hardware Acceleration: -
- GPU Model: -
- Plugins:
- Reverse Proxy:
- Base URL:
- Networking:
- Storage:

Jellyfin logs

Error processing request: "Read-only file system : '<read-only-path>/fanart.jpg'". URL "POST" "/Items/<id>/Images/Backdrop/1/Index".

FFmpeg logs

No response

Please attach any browser or client logs here

No response

Please attach any screenshots here

No response

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[jellyfin-bot]

Hi, it seems like your issue report has the following item(s) that need to be addressed:

• You are not running an up-to-date version of Jellyfin. Please update to the latest release.
• You have not filled in the environment completely.

This is an automated message, currently under testing. Please file an issue here if you encounter any problems.