Outline pattern question about outline-pdf-cjs HOT 6 CLOSED

const { outlinePdfCjs } = require("@lillallol/outline-pdf-cjs");

async function creatOutlines() {
  await outlinePdfCjs({
      loadPath: "in.pdf",
      savePath: "outout.pdf",
      // first column  : page number
      //                 negative for collapsing outline
      // second column : outline depth
      // third column  : outline title
      outline: `
          1||Title 1
          2|-|Title 2
          -3|--|Title 3
          4|---|Title 4
          5|---|Title 5
          6|-|Title 6
          7||Title 7
      `,
  });
}

creatOutlines();

(node:21344) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'objectNumber' of undefined
    at PDFContext.assign (C:\git\formio-sql-service\node_modules\pdf-lib\cjs\core\PDFContext.js:34:17)
    at Object.applyOutlineToPdf (C:\git\formio-sql-service\node_modules\@lillallol\outline-pdf-cjs\node_modules\@lillallol\outline-pdf\dist\outlinePdf\outlinePdfFactory.js:84:29)
    at outlinePdfCjs (C:\git\formio-sql-service\node_modules\@lillallol\outline-pdf-cjs\dist\index.js:21:16)
    at async creatOutlines (C:\git\formio-sql-service\src\test\outline.js:4:3)