Peach tree rootstock bark disease?

General Fruit Growing
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Hello,
My Redhaven peach tree that was planted last winter has these ugly looking scars on the rootstock (peach seedling rootstock I think its called).
Truthfully it had woodchips touching the bark for a while which I heard could cause issues. Its the only tree out of 20+ I planted last year that has this issue.

Does anyone have experience with this type of thing?
Should I get rid of the tree to prevent this type of thing spreading to other trees, or is it a physiological thing that does not spread like a disease or fungus would? I have not noticed any goo coming out of the wound as could be seen with peach canker.
Can I do anything to help it heal or should I just leave it and see what happens?

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The way the bark is cut off looks like the tree was hit on that side by e.g. a mower. The sap is clear so it is not likely to be canker. It should be fine.

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Looks like mechanical damage to me.

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Are these wounds south facing? I think it may be related to wide temperature swings in the winter (sun warming the bark during day, then rapid cooling at night). This can cause cracking of the bark. To prevent this from happening, white wash the trunk with interior latex paint in the fall (which also deters borers).