happened to me before too when i had bad lag. it was due to the fact that i sold goods and got the money on my account but my client didnt update the amount of cargo so i saw myself still having a full cargo hold. first i thought i missclicked and just clicked sell again what gave me the amount of money again and bought the goods for the return trip. got kicked upon launch. no biggie can happen, its the anticheat protection against people who try to manipulate the things they have in their hold and try to make fast money that way.