ImportError: cannot import name 'ToolNode' from 'langgraph.prebuilt' (unknown location)

[beatriz1215]

Example Code:

from langgraph.prebuilt import ToolNode

Package versions:
langgraph-prebuilt: 0.6.4
langgraph: 0.6.7

Already did pip install --upgrade langgraph langgraph-prebuilt

But the error ImportError: cannot import name 'ToolNode' from 'langgraph.prebuilt' (unknown location) keeps raising.