So I've been trying to join a CSV file with a polygon SHP file and everytime I try to save the joint SHP into a new file it transforms the type from int to qlonglong and prevents me from using some other plugins.

Following join between CSV and SHP file

After I save the join file into a new shp file

Is there a way to prevent that conversion from happening or do I have to use the field calculator and convert each column to int?

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