Block Export Issue

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I have faced the issue when Exporting file columns in Block export. Based on Elemental Full Package content.xml fID column should be like this "{ccm:export:file:slider2.png}" when exporting.

But when I export block it will append file prefix before filename like "{ccm:export:file:331539152776:Blossom.jpg}".
So File not yet selecting correctly in Block when try to import content after Importing files. without prefix fID selection working correctly

Replacing Code is here : concrete\src\Backup\ContentExporter.php line # 100 " return '{ccm:export:filee:' . $f->getPrefix() . ':' . $f->getFileName() . '}';"

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