Facebook iOS SDK 3.2在使用logPurchase:currency:

使用新的FacebookIOSSDK3.2，每当我向

[FBInsights logPurchase:price currency:currencyCode];

结果如下-

FBSDKLog: Error Domain=com.facebook.sdk Code=5 "The operation couldn’t be completed. (com.facebook.sdk error 5.)" UserInfo=0x202319a0 {com.facebook.sdk:HTTPStatusCode=400, com.facebook.sdk:ParsedJSONResponseKey={
body =     {
    error =         {
        code = 100;
        message = "(#100) The specified events list contains unrecognized events that cannot be logged";
        type = OAuthException;
    };
};
code = 400;
}

听起来像是Facebook的一个bug，因为这里没有太多犯错的空间

知道为什么会出现这个错误吗