I have just got this message when starting the game will I lose all data if I click enter??

11 hours ago, Daz40 said:

I have just got this message when starting the game will I lose all data if I click enter?

It'll overwrite and delete your old save if you press enter.

If you're using rsmods it's probably created a save backup you can restore, otherwise you could try the custom game toolkit save repair options.