Sometimes when you're exploring, you find some villages generating incorrect biome village variants, such as oak village generating on the spruce forest with literally no plains biome nearby.
Step to Reproduce
1. Create a new world with seed 6498230
2. Go to x= -1156, y= -785
The village generating on the spruce forest is taiga villages.
The village generating on the spruce forest are default oak ones.
There are other examples such as acacia generating on a plains biome, or even default oak villages generating on snow taiga.