the error is in the query you are creating, which you did not post.
it looks like you are concatenating a number to a string . like CustomerID + ' ' + CustomerName and the result is one column is attempting to convert to an integer, instead of the integer columns converting to varchar, that you seem to expect.
you will have to explictly convert to varchar, and columns that are not varchar, like this: CONVERT(varchar(20),CustomerID) + ' ' + CustomerName
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