Getting 1 of 19 shards failed on kibana dashboard


I have installed elastic agent version 7.17, on fleet page it shows healthy.

However when i go to its dashboard, it is showing below error on all dashboards.

## illegal_argument_exception at `shard` 0`index` metrics-elastic_agent.elastic_agent-default`node` SgGSGXafRfysRAH9urACuw

Text fields are not optimised for operations that require per-document field data like aggregations and sorting, so these operations are disabled by default. Please use a keyword field instead. Alternatively, set fielddata=true on [elastic_agent.process] in order to load field data by uninverting the inverted index. Note that this can use significant memory.

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