I use the INTEGRAL() function with two identical constructed series (epever & growatt) see below.

I have no clue why integral returns a timestamp with one of the series but not with the other.

Due to this I can not use the two integration results in an expression in Grafana.

So why is this ? (InfluxDB shell version: 1.8.10)

**> SELECT “Epever Power” FROM “Epever” WHERE time >= now() - 1m**

**name: Epever**

**time Epever Power**

**---- ------------**

**1669665700136709000 0**

**1669665710929789000 0**

**1669665721433642000 0**

**1669665731928040000 0**

**1669665742627442000 0**

**1669665753302892000 0**

**> SELECT “Growatt3B Power” FROM “Growatt3B” WHERE time >= now() - 1m**

**name: Growatt3B**

**time Growatt3B Power**

**---- ---------------**

**1669665721433642000 0**

**1669665731928040000 0**

**1669665742627442000 0**

**1669665753302892000 0**

**1669665763835508000 0**

**1669665774420154000 0**

**> SELECT integral(“Epever Power”,1h) FROM “Epever” WHERE time >= now() - 1m**

**name: Epever**

**time integral**

**---- --------**

**0 0**

**> SELECT integral(“Growatt3B Power”,1h) FROM “Growatt3B” WHERE time >= now() - 1m**

**name: Growatt3B**

**time integral**

**---- --------**

**1669665749550034931 0**

^-- So why is this timestamp missing above with “Epever” ??