How to Undo the Prefab After Deleted

In Unity, if you have accidentally deleted a prefab from your project and want to undo that action, you can try the following steps:

1- Ctrl + Z (Undo):

Press Ctrl + Z (or Cmd + Z on Mac) while your Unity project is in focus. This keyboard shortcut is the universal "Undo" command in many software applications, including Unity. It might revert the deletion if you haven't made other changes since deleting the prefab.

2- Trash/Recycle Bin:

Check your computer's trash/recycle bin. Deleted files are often moved to the trash/recycle bin, so you might be able to restore the prefab from there.

3- Version Control System (if used):

If you're using a version control system like Git, and you had committed changes before deleting the prefab, you can check out the previous commit where the prefab existed and retrieve it from there.

4- Backup (if available):

If you have a backup of your project, you can restore the prefab from your backup.

5- Asset Recovery Package (Unity Pro feature):

If you have Unity Pro, there's a feature called "Asset Recovery" that allows you to recover deleted assets. Go to Edit -> Project Settings -> Editor, and in the "Asset Serialization" section, you can enable "Compress Assets on Import." Then, you can go to the Assets menu and choose "Asset Recovery" to attempt to recover deleted assets.

If none of these methods work, and you don't have a backup or a version control system in place, you may need to recreate the prefab manually by selecting the GameObject in your scene hierarchy and creating a new prefab from it. To do this, follow these steps:

Select the GameObject in your scene hierarchy that you want to turn into a prefab.
Drag and drop it into the project hierarchy. This will create a new prefab with the same name as your GameObject.
Configure the prefab settings, including any components and settings that the original prefab had.

Remember to regularly back up your Unity project and consider using a version control system like Git to avoid such issues in the future.