I am seeing an error:
Rejecting mapping update to [logstash-INDEXNAME-2021.08.03] as the final mapping would have more than 1 type: [_doc, doc]
I suspect this is due to me switching my template from using doc to using _doc, but I deleted the index in question and recreated it to no effect. Furthermore I have a test system with an index template that uses _doc that is not having the same issue. So I do not understand why it is happening in the one system but not the other, and how I can rectify the error.