a bug about attach document?

[CharlesSampson44]

What happened:When I open 2 browsers tab, I attach documents doc1,doc2 on same client in the first tab, and I attach documents doc1,doc3 on same client in the second tab, the first tab will throw an error:
Uncaught TypeError: Cannot read properties of undefined (reading 'peerPresenceMap')
at _Client.handleWatchDocumentsResponse (context.ts:637:1)
at Array. (context.ts:637:1)
at qc. (index.js:5:1)
at Jb (index.js:5:1)
at O (index.js:5:1)
at Ac (index.js:5:1)
at n.W (index.js:5:1)
at n.R (index.js:5:1)

What you expected to happen:no error happend

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

Anything else we need to know?:

Environment:

• Operating system:
• Browser and version:
• Yorkie version (use yorkie version):2.0.15
• Yorkie JS SDK version:2.0.16

[chacha912]

The issue has been fixed with the implementation of yorkie-team/yorkie#463.