So im flying bkk-hel on AY in a week or so and expertföyer is showing the flight zeroed out in economy and 4 available in business... Im on a cheap economy ticket thats upgraded into biz(F) but if oversold im guessing I will be the first one off

never had a oversold flight on AY but do they oversell biz often?? I guess I'm just looking for insight into how worried I should be