Warning in the console when printing a pdf with an added annotation

[calixteman]

Configuration:

• Web browser and its version: Firefox nightly
• Operating system and its version: Windows 11

Steps to reproduce the problem:

1. Open a pdf
2. Draw something on it
3. Print

What went wrong? (add screenshot)
In the console:
Warning: Unknown field name, falling back to empty field name.

I think it's a regression from:
https://github.com/mozilla/pdf.js/pull/16920/files#diff-a7e409abd3d3209d32d3adc8457c5e23feb4c06113a2e065b0c6a9322a3a3369R662

before we were here only when collecting the annotations for the document and now we do it when there's a pageIndex in the params.
And we build some annotations when printing a document with new annotations so it's very likely the root cause.

@Snuffleupagus, would you mind to have a look ?