[Python] "External message was not accepted" error when sending a transaction in TON using...

I'm using pytonlib to send a transaction in the TON network. However, when calling raw_send_message, I get the following error:

pytonlib.tonlibjson.ExternalMessageNotAccepted: LITE_SERVER_UNKNOWN: cannot apply external message to current state : External message was not accepted
Cannot run message on account: inbound external message rejected by transaction 13FB696E8CD9B2F71C7B034A2BB629A14DA4F16143B6395969150C0CDF15F732:
exitcode=0, steps=0, gas_used=0


Here is the code that triggers the error:

query = wallet.create_transfer_message(
to_addr=new_wallet.address.to_string(),
amount=to_nano(0.05, "ton"),
seqno=seqno,
state_init=None # or removed entirely
)

await client.raw_send_message(query["message"].to_boc(False))


Why is TON rejecting the message? Should I update seqno, or is there an issue with the message itself? How can I fix this error?

I try anything in this course said.

What I've checked so far:

• Is seqno correct? – I verified it, and it's 85143.
• Tried removing state_init – The error persists.
• Checked wallet balance – There are enough funds.

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