Some upgraded technologies were impossible to develop after developing the normal ones. I precise that buildings were in the Ovoo’s influence zone. Were concerned:
- Siha Bow Limbs at Archery Range (the one to improve Mangudai and Khan damage: cost 75 wood 200 gold and 275 stone): it says “Conditions: no other improvement” but nothing was developping (no technology and no unit)
- Piety at Monastery (the one to improve chamans’ health: cost 350 stone): Conditions to be fullfiled was empty! "Conditions : "