Influxd.service fails to start after changing flux-enabled = true

I have Raspberry Pi OS 32bit Server on Pi4b installed. Ubuntu 64bit Server doas not support USB-Boot out of the box. I will switch to 64bit Raspberry Pi OS or Ubuntu as soon as it is fully supported.

I have tested those soulutions on Flux not working with InfluxDB 1.8 with no luck.

I followd this guide all I changed is “flux-enabled = true”
Some weeks ago I installed 1.8.6 on a Pi 3b+ with “flux-enabled = true” and runs perfect.

Is there a guide on how to install a specific version? I would like to test 1.8.6 on Pi4b.