Will existing UAN cause any problem during TCS BGV?

Hello, I'm 2025 batch I got tcs ninja offer. I didn't got any joining. My concern is that I created UAN card on Umang App. And UAN number is generated. I don't have any prior experience. I just made it. Will they reject me? Because I heard that they reject freshers who already have UAN number or existing employees ? Please clarify 🙏