Noticeable line between segments of connected wall

Hi all,

I’m super new to Unreal engine and I’m running into an aesthetically displeasing issue. I have two wall pieces (from starter content) connected to each other and it’s quite noticeable that they are two different pieces - I’ve attached an image. I tried building the lighting at all different qualities but this doesn’t seem to change anything, and I have no idea what I’m doing with the lighting options so I figured I’d leave it alone until instructed otherwise. I also tried merging all the walls (actors) together, but that didn’t fix it.

I’m aware that I COULD just make a wall twice the size, UV scale the material, and place it into the level in the same spot. I figure for the sake of learning more that I should troubleshoot this issue.

Thanks a lot!