fix: Set base version etag to a unique id per document creation

Signed-off-by: Julius Härtl <jus@bitgrid.net>

Author: juliusknorr

lib/Service/DocumentService.php

@@ -156,7 +156,7 @@ public function createDocument(File $file): Document {
 		$document->setLastSavedVersion(0);
 		$document->setLastSavedVersionTime($file->getMTime());
 		$document->setLastSavedVersionEtag($file->getEtag());
-		$document->setBaseVersionEtag($file->getEtag());
+		$document->setBaseVersionEtag(uniqid());
 		try {
 			/** @var Document $document */
 			$document = $this->documentMapper->insert($document);