php - Drupal 7 Unable to remove/update uploaded file in content type -

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i have created content type "product" , want possible attach pdf nodes of content type visitors download, created custom field "download" on content type.

the type , widget of field both "file" , in admin have possibility upload / remove file... or @ least, seems so. uploading pdf not problem, added node. if later try remove file - no can't do. can press "remove" button in admin section, , press "save", doesn't give me error , "download" field still empty. if refresh page - bam! there file again.

if both remove action , uploading new file @ same time, again; can press "save", doesn't give me error , filename in "download" field name of new file. new file uploaded. again - after refreshing page, original, first file back.

i chmodded /files/ directory 777 testing purposes, doesn't solve issue. else clue ?

maybe can find clues in logs, don't see related problem @ /admin/reports/dblog ? have access php logs of web server ? if so, have too.


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