Yeah, honestly. My concept isn't new at all. But I try to make little adjustments that help the story stand out. It has a lot to do with my inspirations. If it's eerily close, turn the story to a completely different direction, or introduce a natural element that shakes up the story. Plus, it can help with the pitch. Oh? You like Series A? Then you'll probably like Series B (your series), similar concept, but this one has [insert your interesting appeal twist here]! Check it out!"
Not to mention, my big fear is a story I wanted to tell will be told before I can even finish planning. Rising of the Shield Hero and Chainsaw Man explored concepts I wanted to go over, but with how massively popular they are, no amount of time/skill developed will compete, so I'll keep polishing it till it has an Identity of it's own. Plus, I can learn from those series in what they did right and what could've been done better.
TL;DR: Yes, if you truly want to make that story, then make it. Just make adjustments to make it stand out.