"Not Applicable Datatype" Occurs After Updating to JS SDK v0.4.9

[hackerwins]

What happened:

After updating the JS SDK to version 0.4.9, users are experiencing intermittent not applicable datatype errors. As a temporary solution, we kindly requested a rollback to version to the previous version.

This issue has been reported by teams developing canvas apps, including the "think-with-me" team.

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

I think we can reproduce it in #695.

Anything else we need to know?:

It is presumed that the issue arose due to Undo/Redo in version 0.4.9.

Environment:

• Operating system:
• Browser and version:
• Yorkie version (use yorkie version): v0.4.9
• Yorkie JS SDK version: v0.4.9

[hackerwins]

I have found the document that is causing the problem.

• Document URL: https://codepair.yorkie.dev/qjbxb3

The error occurs when attempting to open the document in the Dashboard.

• https://yorkie.dev/dashboard/projects/codepair/documents/codepairs-qjbxb3