Figure out why.
A little oil in the cylinder and another compression test will give you some info.
If the compression goes up when oil is added then it might just be sticky rings from sitting around too long.
If the compression doesn't go up with oil added you may have valve issues. Could be as simple as a sticky valve, or it may have a burnt valve.
This is all assuming there isn't a hole in the piston or a broken ring.
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