Trying to create a Content Document Link linking a text file to a custom object (an error log object). But keep getting the following error:

>First error: Insert failed. First exception on row 0; first error: FIELD_INTEGRITY_EXCEPTION, You cannot create a link for a document in a private library: ContentDocument ID: [ContentDocumentId]

Any help would be appreciated!

		String now = Datetime.now().format();
		String payload = 'Sync Action: ' + syncActionName + '\nTimestamp: ' + now + '\n\n' + currentPayload;
		
		// create the payload txt file
		ContentVersion conVer = new ContentVersion();
		conVer.Title = 'Payload ' + now;
		conVer.VersionData = Blob.valueOf(payload);
		conVer.PathOnClient = 'payload' + now + '.txt';
		conVer.ContentLocation = 'S';
		insert conVer;
		Id conDocId = [SELECT Id, ContentDocumentId FROM ContentVersion WHERE Id =:conVer.Id].ContentDocumentId;
		
		// link the payload txt file to the error sync log
		ContentDocumentLink conDocLink = new ContentDocumentLink();
		conDocLink.ContentDocumentId = conDocId;
		conDocLink.LinkedEntityId = errorLogId;
		conDocLink.ShareType = 'I'; 
		insert conDocLink;