Migration exception

[zeng-github01]

Issue description:

If crashed, link to crash report (use a site such as pastebin):

Versions:

• Minecraft: 1.7.10
• Forge: 1.7.10 Latest
• CustomNPC+: 1.10.2

Can it be reproduced with just CustomNPC+? If not, list the other mods required to reproduce the issue.

After migrating from 1.6.4, the spawner will spawn NPCs infinitely until the parameters are reset.

The official version also has

[KAMKEEL]

@zeng-github01 I need logs please

[zeng-github01]

@zeng-github01 I need logs please

I'm not sure what log to give you. This problem is too strange; I suspect it's an NBT anomaly in the NPC.

[zeng-github01]

@KAMKEEL This bug has two types. Normally, all NPCs will be generated at once. However, if any of the generated NPCs has the job of spawner, its child NPCs will be generated indefinitely.

However, if the affected NPCs are reset, the normal logic can be restored.

The specific steps involve capturing the generated NPC using the Copying wand, and then reassigning it to the original Spawner NPC.

I've been researching this problem for a long time, but I haven't found the cause.

Could you tell me how to debug based on my description? I can help with logging, provided I know how to do it.

[zeng-github01]

crash-2026-01-25_23.46.41-server.txt

Another migration bug caused a crash