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yes the column is completely filled in, how can I solve the problem?

In practice, I like to write this code in column F.
But when he writes in column F, he deletes the data from the other columns, how come?

column

A B C D E F
0
1...

public void scriviNewId() throws IOException {
String FILE_NAME = "C:\\Users\\java\\Desktop\\x.xlsx";
InputStream inp = new FileInputStream(FILE_NAME);
Workbook wb =...