Some times we confuse an alert with an error.
The text "Data trucanted for column 'colum name' at row n..." indicates that the data you want to set to update a column has more decimals than the expected or in the case of string is longer thant the expected.
No error happened. But You should to check after update if the data stored is your desired values.
This member doesn't quite have enough reputation to be able to display their biography and homepage.