Hi, today, I went into my minecraft world and wanted to get the seed so I typed "/seed" and it said "Seed: [0]"

Now, I think it might have been caused because of a world corruption, this world is 2 years old and has been through versions 1.14.4 and 1.15.2, the seed wasn't wrong in those versions, but I was once playing minecraft 1.17 and accidentally joined in my world with that version because I didn't get any warning message, as soon as the loading screen appeared, I desperately closed mineraft and changed it back to version 1.15.2, I think this might have caused the problem.

I'll wait for any answer, thank you.

Victor_240_1