Unsupported database type in elasticsearch

Hi, i copy GeoIP2-ISP.mmdb into /etc/elasticsearch/ingest-geoip. Then I create a pipline like this:

PUT _ingest/pipeline/geoip
{
"description" : "Add ISP geoip info",
"processors" : [
{
"geoip" : {
"field" : "client.ip",
"target_field" : "geoip.isp",
"database_file" : "GeoIP2-ISP.mmdb"
}}]}

It returns:
[database_file] Unsupported database type [GeoIP2-ISP]
What should I do?
Thanx

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