How to remove a deleted ride's data from Personal Records?

How can I remove/exclude from my current Personal Records power curve the power data that got included from a ride that I deleted in the meantime? The option of tagging this ride to be ‘excluded’ from Personal Records is not possible given the ride was deleted (FYI this ride had inflated power values hence the attempt not to have it distort the records power curve).

Could it possibly work if I manually uploaded the same activity into TR calendar again, then manually exclude it from Personal Records and then delete the activity again from the TR calendar?

You can try that. If it fails, contact for more help.