v7 can't support elasticsearch v6?

[Chu-J]

Please use the following questions as a guideline to help me answer
your issue/question without further inquiry. Thank you.

Which version of Elastic are you using?

[X ] elastic.v7 (for Elasticsearch 7.x)
[ ] elastic.v6 (for Elasticsearch 6.x)
[ ] elastic.v5 (for Elasticsearch 5.x)
[ ] elastic.v3 (for Elasticsearch 2.x)
[ ] elastic.v2 (for Elasticsearch 1.x)

Please describe the expected behavior

we will upgrade es7

Please describe the actual behavior

up, err := cli.Update().
	Index(UserIndex).
	Type("_doc").
	Id("10977524101399128").
	Doc(map[string]interface{}{"s1": 1}).
	Do(context.Background())

elastic: Error 500 (Internal Server Error): execution_exception: MapperException[timed out while waiting for a dynamic mapping update] [type=execution_exception]

Any steps to reproduce the behavior?

[Chu-J]