Using a variable as bucket name in a from() function

Hello.
I have a task where i want to move data from one bucket to another.
In InfluxDB using the flux language I would like to set the bucket where I want to save my data using a variable.

But when I do that I can only set the start time a certain amount back in time otherwise I get an error. If I do not use the variable and I just write the bucket name directly as a string it works with all time ranges where there is data.

My flux query:

option task = {name: "AAA (cloned at 2024-08-14 13:22:00)", every: 1m, offset: 30s}

currentTime = int(v: uint(v: now()))
defaultEndDate = now()

MoveData = (
        serialNum,
        startDate,
        measurement,
        inBucket,
        outBucket,
        endDate=defaultEndDate,
    ) =>
    {
        initialStartDate = int(v: uint(v: time(v: startDate)))
        endedDate = time(v: endDate)

        is1m = true
        is15m = int(v: currentTime % 900000000000) < 60000000000
        isNightly = int(v: currentTime % 86400000000000) < 60000000000
        initialLoad = currentTime < initialStartDate + int(v: 7d)

        range15m =
            from(bucket: inBucket)
                |> range(start: time(v: startDate), stop: now())
                |> filter(fn: (r) => r["_measurement"] == "Status")
                |> filter(fn: (r) => r["Serial"] == serialNum)
                |> map(
                    fn: (r) =>
                        ({
                            _value: r._value,
                            _time: r._time,
                            _field: r._field,
                            Datatype: "Data",
                            _measurement: measurement,
                            _range: "7d",
                        }),
                )
                |> to(bucket: outBucket, org: "Blue North")

        return range15m
    }

MoveData(
    serialNum: "ECO201099",
    startDate: "2024-08-08T12:10:58.000Z",
    measurement: "T00F040",
    inBucket: "Indløbs Bucket - BS Data",
    outBucket: "AAA",
)

The error I get:
could not execute task run: runtime error @28:20-38:18: map: incompatible builder for type string

Thanks!