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Unknown ‘scars’ on tree branches

I wonder if anyone can identify these markings I’ve recently discovered on a new planted Amelanchier tree. Several of the branches have these marks. Thanks. 

Life's tragedy is that we get old too soon and wise too late.
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@fidgetbones or @chicky or someone … what do you think?
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.