Placing an armor stand logs warning "Trying to add entity with duplicated UUID"

Affects 1.16.2 release.
Note that this only works with the armor stand item. Using custom spawn eggs or summon command doesn't give this warning.

Hello,

I am also facing the same issue.

I just upgraded to 1.16.3 and it persists.

One on my player is very fond of having armor displayed as decoration and I get those every time I reload or restart my server:

[10:41:29] [Server thread/WARN]: Trying to add entity with duplicated UUID 291dfbec-2b7b-4c2b-9899-f665ea53af5d. Existing minecraft:armor_stand#43, new: minecraft:armor_stand#44

It is somehow always armor_stand #43 in my case.

fixed in 20w45a

Thanks, appears to be fixed indeed in 20w45a (but still occurs in 1.16.4).

Getting this upon server startup, 1.16.5:

Trying to add entity with duplicated UUID 291dfbec-2b7b-4c2b-9899-f665ea53af5d. Existing minecraft:armor_stand#22, new: minecraft:armor_stand#23

@@unknown, thanks for this information. I have added the affected version, though this issue has already been fixed in the development snapshots (see "Fix Version") and will therefore be fixed in the 1.17 release.