Error 5461 means the product code in your file does not match the records Amazon holds for the product and its brand. Amazon checks the code against the products registered under the brand. A code that matches no registered product returns error 5461, and a code registered under a different brand returns the same error.
The processing report gives five entries for each failed row: the record number, the SKU, the error code, the type, and a message. Record 1 is row 3 of your file, so the row for a record sits at the record number plus two. For error 5461, the message names the field that holds the code. The report does not say whether the code in the file is mistyped or the registration behind a correct code is incomplete. The two cases are separated by comparing the code in the file with your own records for the product.
Two records have to agree before a row is accepted. One is the code assigned to the product, printed on the product and held in your product code records. The other is the code typed into the file. Amazon then checks the code against the products registered under the brand. Error 5461 appears when the code from the file finds no match in that registered set, and the reason can sit in either record.
Where the code in the file already matches the code on the product, no edit to the file changes the result. The remaining step sits in Seller Central and is covered in the next section.
Where the code is right and the registration behind it is missing or held under another name, editing the file changes nothing. The step sits in Seller Central, in the registration records for the brand and the code. The diagnosis marks these rows as outside the file, states the reason, and lists the step to take there. If every error in your diagnosis belongs to that group, we charge nothing.
The free diagnosis reads your failed file and the processing report Amazon returned. It shows every error by SKU, states which errors we fix automatically, which ones need your answer, and which ones the file cannot fix. You see the full breakdown before you pay anything. You can start from the FixFlatFile home page.
Requirements differ by category, and Amazon decides whether a file is accepted.