How to edit message with replacing attached image in it?

[maxsupermanhd]

For example:

-H "Authorization: Bot <sometoken>" \
-H "User-Agent: someBot (site, v0.1)" \
-H "Content-Type: multipart/form-data" \
-X PATCH \
-F 'file1=@/opt/result.png;filename="Attach1.png"' \
-F "payload_json=$(generate_post_data)" \
https://discordapp.com/api/channels/<someid>/messages/<anotherid>

But this method not working! Responding with {"_misc": ["Expected \"Content-Type\" header to be one of set(['application/json'])."]}
PS $(generate_post_data) generates also embed with "image": {"url": "attachment://Attach1.png"}

[MinnDevelopment]

Attachments cannot be edited after being uploaded.

See Edit Message Endpoint

[honzajavorek]

It seems to be possible now. If you end up on this page for the same reasons I did, all you need to do is to clear the existing attachments:

await message.edit(
    files=[File('blah/blah/smurfs-having-a-party.jpg')],
    attachments=[],
)

(The code is py-cord Python package, but you probably get what I mean.)

Docs:

• Edit message
• Uploading files