Yep ! As Daisy said. Your gonna have to get under tree and cut those branches off, close as you can, and keep monitoring them, as they will want to come back, and sooner is better as those thorns are ugly, nasty booger's, plus they sap lots of energy.
While your under tree, check that graph is well above soil line, as, because those water saps, can come out above the graph, if soil is above the graph. If that's so, cut them off also. 👍👍👍