Error starting packetbeat illegal argument exception

[liza-mae]

• Version: Latest 7.x snapshot
• Operating System:
• Discuss Forum URL:
• Steps to Reproduce:
  Starting packetbeat I am getting this error:

2020-01-15T17:25:47.954Z ERROR pipeline/output.go:100 Failed to connect to backoff(elasticsearch(https://10.0.2.15:9200)): Connection marked as failed because the onConnect callback failed: error loading template:
could not load template. Elasticsearch returned: couldn't load template: 400 Bad Request: {"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"Invalid [path] value [tls.detailed.server_certificate.alternati
ve_names] for field alias [tls.server_certificate.alternative_names]: an alias must refer to an existing field in the mappings."}],"type":"illegal_argument_exception","reason":"Invalid [path] value [tls.detailed.server_certi
ficate.alternative_names] for field alias [tls.server_certificate.alternative_names]: an alias must refer to an existing field in the mappings."},"status":400}. Response body: {"error":{"root_cause":[{"type":"illegal_argumen
t_exception","reason":"Invalid [path] value [tls.detailed.server_certificate.alternative_names] for field alias [tls.server_certificate.alternative_names]: an alias must refer to an existing field in the mappings."}],"type":
"illegal_argument_exception","reason":"Invalid [path] value [tls.detailed.server_certificate.alternative_names] for field alias [tls.server_certificate.alternative_names]: an alias must refer to an existing field in the mapp
ings."},"status":400}. Template is: {

[liza-mae]

cc: @adriansr

[liza-mae]

After talking with Adrian does not appear to be related to issue opened earlier for #15512

[elasticmachine]

Pinging @elastic/siem (Team:SIEM)