Server overloading when starting

Hello. My server overloads just when starting. I tried downloading the world, I checked it and there wasn't anything like a big explosion or similar which would crash the server, it's online, but when I join it it crashes ( I can't even load the map, I just get an out of time error). Here's the log: https://mclo.gs/psXaOVJ (see the ending for relevant information). It has happened since I updated to 1.13 (can't downgrade as I made it when it first rolled out and map upgraded)

I would really appreciate help

I have tried 1.13.2, same thing. I have downloaded the world and tried to kill most entites, but it still uses around 1.4GB RAM (in local save)

I found a solution but it doesn't work well: I found a 1.12 backup save I had, so I uploaded it, but it didn't upload, as server crashed with 1.13 error: reuploaded it, same error. Downloaded to check: downloaded save was 300MB, while that backup was 196MB... I need help

Quote from alguienrrr

I found a solution but it doesn't work well: I found a 1.12 backup save I had, so I uploaded it, but it didn't upload, as server crashed with 1.13 error: reuploaded it, same error. Downloaded to check: downloaded save was 300MB, while that backup was 196MB... I need help

I was able to fix this. Now my server runs properly in 1.12

I download backups frequently so if something happens I can go back to a previous state. You can do this by going to the worlds menu and pressing 'Download'.

Quote from Roman

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Thanks, this is much better than what I said, I didn't know this existed