HTTP 409 Conflict Error - Meaning & Fix

Main causes

Attempting to upload a file that's older than the one already on the server.
Submitting a PUT request that conflicts with another user's simultaneous changes to the same resource.
Trying to delete a resource that's linked to other resources, causing a dependency conflict.
Updating an item to a database when the update conditions violate the entity's constraints.

# Request example 
curl -X PUT https://sandbox.oxylabs.io/ -H 'Accept: */*;q=0.8' -H 'Accept-Encoding: compress' -H 'User-Agent: AppleWebKit/537.36'

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Review and modify the `Accept` headers in your request to include more general or different content types that the server supports.
Ensure that URL endpoints are correct and the resource is capable of returning the requested format or language.
Add or adjust the `Accept Language` header in your request if the error is related to language preferences not being acceptable.

# Response example 
HTTP/1.1 409 Conflict
Content-Type: text/plain; charset=utf-8
Content-Length: 31

Conflict: Resource state mismatch.

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From

401 Unauthorized	403 Forbidden	404 Not found	405 Method not allowed	406 Not acceptable
407 Proxy authentication required	408 Request timeout	409 Conflict	410 Gone	411 Length required
412 Precondition failed	413 Payload too large	414 Uri too long	415 Unsupported media type	416 Range not satisfiable
417 Expectation failed	421 Misdirected request	422 Unprocessable entity	423 Locked	424 Failed dependency
426 Upgrade required	428 Precondition required	429 Too many requests	431 Request header fields too large	444 Connection: close
451 Unavailable for legal reasons	499 Client closed request	501 Not implemented	503 Service unavailable	505 Http version not supported
506 Variant also negotiates	507 Insufficient storage	508 Loop detected	510 Not extended	511 Network authentication required