Sketch contains duplicates perfectly aligned

I have somehow duplicated a sketch directly on top of itself (4 X). It did not make duplicate sketch layers just duplicate points and lines. The only way I can find to remove them is by trimming each line 3 times. Selecting the line allows me to move all the copies in unison I can not select individual overlaps just trim one at a time. There where over 500 parts to the original so now there are over 2000 in the single sketch. Any chance there a way to remove duplicates?

I have a video but since I’m new I can’t uploaded it.

Thanks for any help here