People of Kemerovo region accidentally raised a Serbian flag

https://drive.google.com/file/d/1CWpPHxuNAmzhd-7nRvu_6qqijLwJy_Xq/view?usp=sharing

In one of the schools in the Kemerovo region, an upside-down flag of Russia is flying.
The flag was raised on the ceremonial line, where the national anthem was played.
Russian flag (White, Blue, Red) if turned upside down (Red,Blue,White) gives Serbian flag