Message not modified · message.not_modified

Stable ID: message.not_modified · Evidence: source derived

The requested message content and reply markup are unchanged.

The response does not include the current message or establish the history of concurrent edits.

When it matches

Every field in a rule must match. Alternative rules are joined with OR. Codes below are JSON response fields, not inferred HTTP statuses.

• JSON error_code: 400.

Exact description:

Bad Request: message is not modified: specified new message content and reply markup are exactly the same as a current content and reply markup of the message

See matching rules for parameter precedence and unknown or ambiguous results.

Illustrative methods: editMessageText, editMessageCaption, editMessageReplyMarkup.

Possible causes

• The requested edit repeats the current content and markup.

Before deciding what to do

Application decision: accept existing state if intended. Repeat request: unhelpful without change.

• The application considers an already-applied desired state a successful outcome.

These are application choices. Errorgram does not retry, suppress the error, or change bot state.

Facts

This condition adds no extracted facts; result.facts is empty.

Example

Synthetic examples derived from the cited source.

API method: editMessageText.

{
  "ok": false,
  "error_code": 400,
  "description": "Bad Request: message is not modified: specified new message content and reply markup are exactly the same as a current content and reply markup of the message"
}

Python

from errorgram import classify

response = {
    "ok": False,
    "error_code": 400,
    "description": "Bad Request: message is not modified: specified new message content and reply markup are exactly the same as a current content and reply markup of the message",
}
result = classify(response, method='editMessageText')

assert result.id == 'message.not_modified'
print(result.entry["summary"])

JavaScript and TypeScript

import { classify } from "errorgram";

const response = {
  "ok": false,
  "error_code": 400,
  "description": "Bad Request: message is not modified: specified new message content and reply markup are exactly the same as a current content and reply markup of the message"
};
const result = classify(response, { method: "editMessageText" });

if (result.status === "matched" && result.id === "message.not_modified") {
  console.log(result.entry.summary);
}

Framework names

Integration	Type or ID
Python	errorgram.MessageNotModified
aiogram	errorgram.aiogram.MessageNotModified extends TelegramBadRequest
grammY	EnrichedGrammyError with classification.id equal to message.not_modified

Enrichment is explicit and keeps framework catch compatibility. Follow the Python and aiogram guide or JavaScript, TypeScript, and grammY guide.

Evidence

• Bot API 10.3 · telegram-bot-api/Client.cpp:106–113. MESSAGE_NOT_MODIFIED is rewritten here; prefix and initial-case handling are at lines 165-205. Revision e3e9dd8e5b3d7ab8537cd5a10dc31d5ffa8f82d1.

Source references identify the reviewed revision, not the first release that introduced this response.

Data and versions

Catalogue 0.1.0 · schema 1.0.0 · reviewed 2026-09-15.

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