I have installed WATCHOS 26 Developers Beta in my Apple Watch 6 after installation I found that the battery drains after two hours Now i can not remove 26 and go back to earlier version any ideas

After the last OS26 developer beta update the watch series 6 battery drains fast, in less than two hours life. I visited Apple Store , they said the battery was dead so I had to buy new watch series 10 The same issue happened in the new watch, the battery meter shows 50% after 1 hour Right now I’ve downgraded my update version to beta 11 until I can find a solution