Why do the idols of Jagannath temple change every 12 years, you will be surprised to know the reason

Rath Yatra 2024: Jagannath Puri Rath Yatra has started. This ceremony is going on with great enthusiasm in Puri, Odisha. It is being told that the Rath Yatra will last for 2-3 days. There are many secrets of Jagannath temple which you may not know. The idols of Jagannath, Balram and Subhadra are replaced every 12 years. There is a unique reason behind this.During the Naklevar ritual, the city lights are switched off and the idols are replaced in the dark. No one is allowed to look at the idols during this process.
The idols of Jagannath, Balarama and Subhadra are made of lime wood. These idols are made from the trunk of a 100-year-old lime tree. When Shri Krishna left his body, his heart remained in Puri. That is why it is said that the temple of Jagannath is that of Shri Krishna himself.
Devotees fear that the lemon stems may deteriorate quickly. Therefore, the idols are replaced every 12 years. The old idols are taken to a temple called Koili Vaikunth. They are immersed there.