Exception: "400" Status: undefined_field_index_id: undefined_field_index_id

I am having the same issue of "undefined field index_id"
The Drupal has to connect to an existing Solr instance to index the content from Drupal.
The Solr instance does not have index_id whereas Drupal trying to query with index_id

Request #1. Search API Solr Debug: Response => Array
(
[request count] => 1
[datetime] => 2023-08-15T10:14:20+00:00
[query_time] => Solr query took 213.68ms.
[Solr response headers] => Array
(
[0] => HTTP/1.1 500 OK
)

[Solr response body] => {"responseHeader":{"status":500,"QTime":67},"error":{"trace":"java.lang.NullPointerException\n\tat org.apache.solr.search.TermsQParserPlugin$1.parse(TermsQParserPlugin.java:117)\n\tat org.apache.solr.search.QParser.getQuery(QParser.java:168)\n\tat org.apache.solr.update.DirectUpdateHandler2.getQuery(DirectUpdateHandler2.java:429)\n\tat org.apache.solr.update.DirectUpdateHandler2.deleteByQuery(DirectUpdateHandler2.java:459)\n\tat org.apache.solr.update.processor.RunUpdateProcessor.processDelete(RunUpdateProcessorFactory.java:78)\n\tat

The Solr index will have indexes from multiple sources, so cannot modify the schema as per Drupal.
- Can we remove the index_id from Drupal so Drupal does not use index_id at all?
- The Solr instance has camelCase which is throwing error in screen if I try to map the Solr schema field names in the machine name unde r the fields tab.
"Field IDs must contain only lowercase letters, numbers and underscores."
- Is there any patch for the same or this can be altered in document alter hook?
- Using the below hooks where the document alter is not at all triggerring.
hook_search_api_solr_field_mapping_alter
- unset the index_id but still the same issue
hook_search_api_solr_documents_alter
- this hook is not triggering at all during indexing
- is it because the it does the query first?? which is failing??

For the record (as this is only one of two results in Google for this issue)

Per #12, uninstalling and reinstalling search_api and search_api_solr resolves the issue for me on Drupal 10.