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JavaScript Data GridAG Grid Error #2
You are using an older version of AG Grid. To upgrade, please see the migration guide.

This is an error about duplicate node ids. See Row IDs docs.

Why is this error happening?

Because you have a duplicate node id

Full Error Text

Duplicate node id 'undefined' detected from getRowId callback, this could cause issues in your grid.
To show this error text in the dev console, import the ValidationModule.