I tested with similar data below, but any post meta values were not deleted.
"post_type","post_id","list-state"
"post",72,"Radovljica"
"post",73,"Tolmin"
"post",74,"Mozirje"
Could you send me or upload your actual csv file?
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Takuro Hishikawa on "[Plugin: Really Simple CSV Importer] Deleting all post meta on import"
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