Filebeat stop sending the logs bulk index operations: 400 Bad Request

Filebeat is not sending logs to elastic host. showing some error

ERROR [publisher_pipeline_output] pipeline/output.go:180 failed to publish events: 400 Bad Request: Collected errors:
** Error 0: failed to encode bundles: oformat.EncodeObservations() failed for bundle 1: observation too large**
Anyone know what is this error and how to remove?