Deprecation message in Kibana Console

[muhamadli302]

Hi,

I'm using the kibana console to run queries. Kibana and ES version 5.4
It worked fine, until I tried to enter some index templates.
This is my query:

POST _template/my_template
{
"template" : "index"
},
{
"mappings": {
"info": {
"properties":{
"Name": "text"}}}
}

The error I'm getting is this, in red:
#! Deprecation: Content type detection for rest requests is deprecated. Specify the content type using the [Content-Type] header.

I haven't found much information on this error in google, does anyone know why it happens?

Thanks

[warkolm (Mark Walkom)]

What version are you on?

[muhamadli302]

sorry, Kibana and ES version 5.4. Also edited on the question itself.