At the campaign level, a negative bid adjustment is set for women 45+ in age, but a positive bid adjustment is set for them at the ad group level. Which bid adjustment will apply?

It is impossible to set up such adjustments.
The positive bid adjustment will apply, since bid adjustments at the ad group level have priority over those at the campaign level.
The negative bid adjustment will apply, since campaign level bid adjustments have priority over those at the ad group level.