coerce_values issue

[vitcon-iot]

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• Version: 5.0.5
• Operating System: centOS8
• Config File (if you have sensitive info, please remove it):
  influxdb {
  myHash['sensortype'] = sensortype
  70 myHash['coercetype'] = ''
  71 if sensortype == 'i'
  72 myHash['coercetype'] = 'integer'
  73 elsif sensortype =='f'
  74 myHash['coercetype'] = 'float'
  75 end
  76 myHash['prefix'] = prefix
  77 sensors.push(myHash)

173 db => "xxxxx"
174 host => "xxxxx"
175 measurement => "%{[sensor][prefix]}.%{[sensor][key]}"
176 user => "xxxxx"
177 password => "xxxxx"
178 port => "xxxxx"
179 send_as_tags => ["gatewayId"]
180 data_points => {
181 "hostname" => "%{[host]}"
182 "gatewayId" => "%{[gatewayId]}"
183 "status" => "%{[sensor][value]}"
184 }
185 coerce_values => {
186 "status" => "%{[sensor][coercetype]}"
187 }
188 }
189 }

- Sample Data:
this is std output--- debug
"host" => "xxx",
"type" => "xxxx",
"sensor" => {
"value" => 17.1,
"key" => "30AEA4C519C9-temperature_f-1",
"sensortype" => "f",
"coercetype" => "float",
"prefix" => "series",
"time" => 1581066461321

• Steps to Reproduce:

warnnning message
[2020-02-11T20:11:26,421][WARN ][logstash.outputs.influxdb][main] Don't know how to convert to %{[sensor][coercetype]}. Returning value unchanged
[2020-02-11T20:11:26,834][WARN ][logstash.outputs.influxdb][main] Don't know how to convert to %{[sensor][coercetype]}. Returning value unchanged

influxdb field type
fieldKey fieldType

---

hostname string
status string

Hello
I used coerce_values ​​because I want to dynamically give field type per measurement
A warning has occurred as shown below.
Have I missed anything? Is the grammar wrong?