I not understand how it happened. But when i was pushing single submission today 11:34 UTC. The system also has taken 1 more submission (51) that was already sent by my teammate at 00:42.
It just so happened that I saw this only after sending one more submission (that is 5th in 24 hours).
Can you please remove submission https://gitlab.aicrowd.com/vitaly_bondar/flatland/issues/51
You can easily verify that it is the same source codes as in https://gitlab.aicrowd.com/vitaly_bondar/flatland/issues/50