In my world I have some villagers that are made with commands. They have names, custom heads, custom trades and other tags. I found a EXACT duplicate once. Exact same trades, head, profession etc.
UPDATE:
On 12-3-16, I found 3 of the same villager. Exact same. It duplicated pretty fast becuase I teleport them sometimes and it tells me how many there are.
Linked issues
duplicates 1
Comments 8
I only spawned the villager once. It has happened multiple times. The most recent one took a month or so for it to duplicate.
Is this still an issue in the most recent versions (currently that is 1.11) of Minecraft? If so, please update the affected versions and help us keeping this ticket updated from time to time. If you are the owner/reporter of this ticket, you can modify the affected version(s) yourself.
This has happened on many villages i've played. It is not unique to this world. I have tested it on brand new worlds.
Duplicate of MC-22147
Maybe you just executed the same command to spawn a custom villager twice?