Has the reward for a ruined Udhiyah been lost due to poor storage and bad weather conditions, and must it be repeated next Eid?

You are not required to offer another sacrifice with the intention of replacement if you have met the conditions for the sacrifice. The Prophet, peace and blessings be upon him, said: "Whoever slaughters after the prayer has completed his ritual and followed the Sunnah (definition) of the Muslims."

There is no blame for what was spoiled from the sacrifice due to storage, because storing the sacrifice is permissible, based on the Prophet's, peace and blessings be upon him, saying: "Keep what seems good to you," and his saying: "Eat, give in charity, and store."