Ah, the classic "fresh start" delusion. Developer sees their old project infested with bugs (those cute green gremlins), and thinks starting a new project will somehow magically solve everything. Then proceeds to literally copy-paste chunks of the old code—bugs and all—into the new project.
The box even says "THIS SIDE UP" upside down because reading documentation was never our strong suit. Ten years of experience has taught me that no matter how clean the new repo looks, those bugs are just waiting for their chance to emerge... usually right before a demo to the client.