The Guarapuava airport in Brasil has an incorrect ICAO designation, it is currently listed in the sim as SBGU, but the designation changed a few months ago to SSGG as can be seen on the website of the Brazilian Air Force’s Airspace Control Department: AISWEB - Informações Aeronáuticas do Brasil
It’s not really wrong ICAO code, if it was correct at the time of the MSFS database was created. They just need to refresh the database from a current version.
Perhaps, Navigraph already have it corrected.
it’s up to the nation-state to provide AD (aerodrome) updates to ICAO via AIP. Likely it will be in one of the next 28-day cycles if that notification has already happened.