Hi,
please add the integer values in your csv file at the 4th position and not in the 3rd position. The alter table statement resulting from the change of the hdbtable file adds the new column also on the 4th position and not on the 3rd (as you did it in the definition).
If you have further problems, remove the settings from the hdbti file temporary and adjust your csv and hdbtable files. Afterwards reset your hdbti file.
Best Regards,
Florian