In one ocean monument, there were more than 3 elder guardians. Two in the same place and one in the other two places.

My theory is that when my world was in 1.19.4 I accidentally loaded the chunk where the two elder guardians were, and when I upgraded the world to 1.20.1 the game thought that there were no elder guardians, so the game generated other three guardians instead of two.

The seed of the world is: 2967423764330639638 

World download: https://www.mediafire.com/file/n2f90irig8h0ms3/world+(4).zip/file

The coordinates of the monument are: 1300 -200