First question, how long has it been connected?
Second question, if you read it again now, what is the error count. That looks suspiciously like a -1 incrementing. If the new number is higher then it's something to worry about. If it is lower we need to subtract it from whatever -1 is in that size field if reported as unsigned to see what it actually is. (Sorry if that confuses you but my brain is tired. But negative numbers are often set in computers using the left-hand bit. 0 is followed by a positive number, 1 is followed by a number = to (the maximum value of all the bits -1).
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