UpdateListing returns 404 "Resource not found" on valid listing

[tailoredfoxnz-create]

Hi,

I'm attempting to update listing titles using the Open API v3, but the update endpoint returns:

{"error":"Resource not found"}

Details:

user_id: 686442178
shop_id: 37840558
shop_name: TailoredFoxNZ
listing_id: 1614819924 and 1411876240

What works:

GET listing works correctly
Listing belongs to this shop
Listing is active
OAuth connection is valid
Listing appears in active listings results

Failing request:
PUT /v3/application/shops/37840558/listings/1614819924

Headers:
x-api-key: <api_key>:<shared_secret>
Authorization: Bearer <user_id>.<oauth_token>
Content-Type: application/x-www-form-urlencoded

Tests performed:

Sent current title unchanged
Sent current section_id unchanged
Tested both inside Node.js and directly via PowerShell
Tested mulitple listings

Result:
All update attempts return:

{"error":"Resource not found"}

Could you confirm whether:

There are any restrictions on updating this listing type
There is a known issue affecting updateListing
Any additional permission scope is required

Thanks

[openapi-support[bot]]

Hi, you are using the deprecated updateListing endpoint. The endpoint you should be using is a PATCH, not a PUT. Please see our documentation for reference.