Saving files deletes entire timeline.

Hi @ariana_2998 

Welcome to the Premiere Pro Forum community. Thank you for taking the time to report a problem. It would help us if you could use the link here, How to Report a Problem, which has steps to provide more information that can help us identify the issue. We are currently aware of an issue where if you save as and replace the file, the display panels go black. Here is the link to the problem. Let me know if this helps. https://community.adobe.com/t5/premiere-pro-bugs/p-saving-in-25-6-2-you-do-not-have-write-access-to-the-directory-and-save-as-crashes-premiere-pro/idi-p/15604457

Here to help.

Ian