OctoPrint sets my nozzle temperature/nozzle offset too high

If your target temperatures are being set too high, first test if this is still the case in safe mode. If not, it's caused by one of your third party plugins messing with the temperature overrides, e.g. Filament Manager.

Filament Manager

We have seen a lot of issues like this caused by the per spool offset feature provided by Filament Manager when people configure an offset of 200°C when in fact they meant to set a target of 200°C. So if you have this installed, please double check your configuration and make sure you have your offsets set reasonably against the targets defined in your sliced files.