Unknown structure start

Hello, when I tried to start my server, the console was filled with messages like this:

Unknown structure start: mostructures: killer_bunny_castle

A friend told me that maybe it was because of the Mo' Structures mod so I removed it, and the same messages were still there

Here the link of the log: https://mclo.gs/GOoHzqq

Pls Help :c

I already fixed the bug, I added the Mo' Structures again and it was solved thanks for the help