Some "meeting point 1" structures in superflat worlds generate an extra pool

Summary

Some villages in superflat worlds generate a "meeting point 1" structure with an extra pool.

Steps to Reproduce

1. Create a superflat world.
2. Use

   /locate structure village_plains

   to find the nearest village.

3. Teleport to the village.
4. Check if the meeting point is the "meeting point 1" (which has a 2*2*2 well made of cobblestone).
   1. If it is, set your gamemode as spectator, and go to the underground to find if there is a 2*2*2 pool separate from the well of the meeting point.
   2. If it isn't, please look for another village, or create a new superflat world.

Observed Results

If the village generates a "meeting point 1" as its meeting point, there may be a 2*2*2 pool beside the meeting point. The wall of the extra 2*2*2 pool is made by cobblestone, the same as the structure of "meeting point 1".

Expected Results

The 2*2*2 pool shouldn't exist.