Error - configuration specified the fields ["__something__"], but they weren't used

[Trovalo]

Relevant telegraf.conf:

# Collect statistics about itself
[[inputs.internal]]
  ## If true, collect telegraf memory stats.
  # collect_memstats = true
  [inputs.internal.tags]
    telegraf_instance = "Telegraf Gateway"

Here is the error I get

2020-11-16T15:53:50Z E! [telegraf] Error running agent: Error loading config file configuration\gateway\telegraf.d\input_internal.conf: plugin inputs.internal: line 3: configuration specified the fields ["tags"], but they weren't used

System info:

• Windows Server
• Equivalent to Telegraf Nightly (I usually make my own build)

Steps to reproduce:

• Specify some additional static tags in an input plugin using the [inputs._inputname_.tags]
  In my case I've just used the internal plugin, but I think the issue present itself on any plugin.

Expected behavior:

The configuration is valid and everything runs

Actual behavior:

an error happens

Additional info: