Sometimes things go wrong and you might find things like these in your database:
$ influx -database umwelt_airrohr -precision rfc3339
> SELECT bme_t, dht_t, p10, p25 FROM research_node_5_sensors ORDER BY time DESC LIMIT 3;
time bme_t dht_t p10 p25
---- ----- ----- --- ---
2036-02-07T06:28:00Z 21.35 19.8 424.5 361.3
2019-01-18T04:54:00Z 20.61 19.2 413.8 316.9
2019-01-18T04:53:00Z 20.63 19.2 406.4 316.8
To delete this weird reading from the future at 2036-02-07T06:28:00Z, check again for the timestamp in unix epoch
$ influx -database umwelt_airrohr
> SELECT bme_t, dht_t, p10, p25 FROM research_node_5_sensors ORDER BY time DESC LIMIT 3;
time bme_t dht_t p10 p25
---- ----- ----- --- ---
2085978480000000000 21.35 19.8 424.5 361.3
1547787300000000000 20.61 19.2 410.1 317.6
1547787240000000000 20.61 19.2 413.8 316.9
and finally delete the erratic record
> DELETE FROM research_node_5_sensors WHERE time=2085978480000000000;