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Meaning of "site1xxx" (FTP file/folder owner)
The owner "site1xxx" (e.g., site1152, site1163, site1184) appears when the FTP user account that created the folders/files in question has been removed from the list of FTP user accounts.
To regain access to these files for modification, you need to log in with a different FTP account in the FTP Manager file manager and change the owner of the files using the "Properties" button.