Don't try to access nutrient_upscale_ratio for PracticeFlowNodes
The way it was currently implemented it could happen that we tried to access nutrient_upscale_ratios for FlowNodes other than FoodProductFlowNodes which leads to an attribute error. By moving the if-block inside the if-is_triggered_by_tag_xids-block this won't happen.
Edited by Yannick Schubert