Duplicating GraphEdit in editor prints error

[aaronp64]

Tested versions

v4.3.beta.custom_build [e96ad5a]

System information

Windows 10

Issue description

Duplicating a GraphEdit node in the editor prints the error below. Same error during each step of copy/paste. The duplicated GraphEdit still seems to work ok in a running project, and I don't see the error when calling $GraphEdit.duplicate() in gdscript.

  scene\main\node.cpp:1682 - Index p_index = 1 is out of bounds ((int)data.children_cache.size() = 1).
  Child node disappeared while duplicating.

Steps to reproduce

In a new project, create a scene and add a GraphEdit child. Duplicate or copy/paste the GraphEdit node, and the error should print in the Output tab

Minimal reproduction project (MRP)

N/A

[JekSun97]

This is not necessarily related to GraphEdit, I have found this issue when duplicating other nodes as well - #92724 (comment)

[matheusmdx]

Bisecting points to #91677, but that pr was made to avoid the crash caused by pr #87387, so the original problem needs to be investigated to solve that

[Rindbee]

It may be necessary to check data.parent_owned of the original node's children and DuplicateFlags.