safe

Sets temperatures and zOffsetAdditional to null.

If BuildSettings.scriptsCanOverrideSlicerSettings == ScriptsCanOverrideSlicerSettings.SOME, then the most dangerous overrides are ignored. If you download a model, it cannot break your printer (or set fire to your house) when printed.

If you are still concerned :

Settings -> General Settings -> Scripts Can Override Slicer Settings  ( NO )