Azure AI Search indexer reported "Target field 'chunk_id' is either not present, doesn't have a value set, or no data could be extracted from the document for it.Failed document:"

Question

Hi,

I am trying to create an indexer using Azure Storage and Azure AI Search.

In AI Search, when I select the column to vectorize from my CSV file or JSONL file through "Data Import and vectorization", and then create the indexer, I get the following error:

Task: Target field 'chunk_id' is either not present, doesn't have a value set, or no data could be extracted from the document for it.Failed document: 'https://ragstorage1.blob.core.windows.net/test01/test0101Prod250812.jsonl'

Previously, the index was created successfully, but now it suddenly fails. I’m not sure what is causing this issue.