Consider an ERC721 contract A that has an NFT with ID 1. The bridging of this token causes the deployment of a new contract A* and minting of an NFT with ID 1. If later the token with the ID 1 of another ERC721 contract B is transferred through the bridge, a contract B* will be deployed so the token 1 of the contract A* and the token 1 of the contract B* maintain their uniqueness.