SQL Injection Detected?

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Anyone here playing anno1777? Well I have been playing this game for quite a while, for some reason or another, i actually like the gameplay. But recently, I attacked another player and tried selling the prisoner/slave for gold and I got this message "SQL Injection Detected." I have no idea what it means, the other prisoner/slaves I have can be sold regularly, I just don't know what's up this time. Does anyone have any idea?