Insert timeseries even if fromtime is null

migrations/kvalobs/import/cache/main.go

@@ -3,7 +3,6 @@ package cache
 import (
 	"context"
 	"database/sql"
-	"errors"
 	"log/slog"
 	"os"
 	"time"
@@ -36,8 +35,10 @@ func (c *Cache) GetSeriesTimespan(label *db.Label) (utils.TimeSpan, error) {
 		return timespan, nil
 	}
 
-	// If there is no timespan we can't insert a new timeseries
-	return utils.TimeSpan{}, errors.New(label.LogStr() + "No timespan found, cannot create timeseries")
+	// If there is no timespan we insert null fromtime and totime
+	// TODO: is this really what we want to do?
+	// Is there another place where to find this information?
+	return utils.TimeSpan{}, nil
 }
 
 func (c *Cache) TimeseriesIsOpen(stnr, typeid, paramid int32) bool {

migrations/lard/timeseries.go

@@ -2,7 +2,6 @@ package lard
 
 import (
 	"context"
-	"errors"
 	"migrate/utils"
 
 	"github.com/jackc/pgx/v5/pgxpool"
@@ -62,10 +61,6 @@ func GetTimeseriesID(label *Label, timespan utils.TimeSpan, pool *pgxpool.Pool)
 		}
 	}
 
-	if timespan.From == nil {
-		return tsid, errors.New("Fromtime should never be null when creating new timeseries")
-	}
-
 	// If none of the above worked insert a new timeseries
 	transaction, err := pool.Begin(context.TODO())
 	if err != nil {