RemoveMessage not working

[apoorvkk]

Hi team,

I keep getting this error when I try to add a RemoveMessage instance to the messages property:

Background run failed. Exception: <class 'ValueError'>(Message dict must contain 'role' and 'content' keys, got {'lc': 1, 'type': 'constructor', 'id': ['langchain_core', 'messages', 'RemoveMessage'], 'kwargs': {'id': 'ck-5907b8c8-74d4-47f8-b3b3-9d5e820d0443', 'content': '', 'additional_kwargs': {}, 'response_metadata': {}}}
For troubleshooting, visit: https://python.langchain.com/docs/troubleshooting/errors/MESSAGE_COERCION_FAILURE )

Any reason why this might be happening? cc @vbarda @nfcampos (found this PR of when it was added in for python: #651)

I am using MessagesState for my state as well.

[apoorvkk]

I am using langgraph dev to run my server and this is what it spat out before it could even hit the first node of my graph.

[ronak-ciphernutz]

You might pass whole message to RemoveMessage , Pass only message id , instead of passing whole instance , it might solve this error according to doc