The cc object I'm woking on has weird spiky shadows on it

Hello, I just created my account in s4s so this is my first post ever. I need help with a custom mesh I am working on, this is why I am here now. I wanted to ask if anyone knows how to fix this issue and would be willing to give me some advice on what to do. Please, if anyone knows what the problem is and knows how to fix it, tell me what do you think or know I should do. Thank you so much in advance for reading my post.

I am very new to all this.

The mesh I am working with is, well, an alien spaceship and I managed to import it into the game, it shows up and all seems Okay, but once I place it into the world, I can clearly see that the item has weird shadows coming from the center of the mesh and I have no idea what to do to fix it. I took some screenshots of it...

  

Screenshot of the weird shadows: www.deviantart.com/leereblume/art/Weird-shadows-emerging-from-the-mesh-c-866722929
close-up: www.deviantart.com/leereblume/art/Closeup-866756778
Different perspective: www.deviantart.com/leereblume/art/Different-perspective-of-the-weird-shadows-866723824


This item is a build buy object. I cloned a base-game Fruit Bowl (Bowl of Fruit sculptTableSCFruitBowl_01_set1 00000000000061F1) to replace it with the custom mesh.

Things I have not modified while putting together the package file of this item:
- The two DST image files under the main texture (which I think are the Normal or Bump textures and the Specular).
- Adjust the Footprint to fit the mesh.
- Light section in the Warehouse

Could it also be that the problem is something I did in Blender?

I think that the point of all this is just that I don't know what to look for in order to start investigating what went wrong. I am hoping that someone out there will give me some directions for me to start reading and learning exactly what I need in order to fix this. Thank you very much for reading