Oleg, what mod(s) did you have installed when you created the AI files?
I was testing something else, and noticed that the Fractal had been chosen as a random AI, so I switched them to human control to take a look at them. On their turn I got an error message about the default fleet formation of Compact, which I believe is from TDM-Modpack. When they started designing new ships, they used several non-standard ship types, as well.
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Cap'n Q
My first SE IV mod!
Hypermaze quadrant
The most merciful thing in the world, I think, is the inability of the
human mind to correlate all of its contents. We live on a placid
island of ignorance in the midst of black seas of infinity, and it was
not meant that we should go far. -- HP Lovecraft, "The Call of Cthulhu"