My Minecraft Chunk is missing!

Hi, as my topic said...

I built my base to certain area and this missing chunk happened when my server closed due to "stackoverflow error". When I logged in back again this happen.

I tried F3+A to reload chunk but still nothing

I hope there're solutions without me resetting the world....again

Thanks a million

Quote from Powerful845tiger

Do you have backup of your server before you faced the issue?

I do have backup