Motor stall and crash. 3.3 rc8. What could have I done ?

Hi guys. This morning I had to reconfigure my F550. I needed the 40a 6S capable esc it had for a future Y6 build.

I just swapped them for rctimer 30A 4S opto esc I had from another build. The motors are rctimers hp2217-930kv with 10x3.8 props so all s

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