Plan marked as deleted, when I did not delete it

Hi! I just went to open a plan of mine that I use quite often, to see the message shown in the screenshot below: This plan has been deleted. At the top of the screen, I see "We couldn't load your plan. Please try again later," with the following info:

• Correlation Id: 9b1ad5a0-b760-4517-88f2-55c51d1d5bd1
• Time Stamp: 2025-06-03T14:35:07.183Z

Im worried that it's not just a bug that will get fixed with me trying again later, but actually that the plan was deleted. Is there any way to recover a deleted plan?

These are the only buttons I see in Planner and none to a trash bin or something of the sort.

I don't even know how a plan could be deleted since that is not even an option when the three dots next to a plan is clicked:

Has anyone experienced this?