Struct field "chainlink_feed" is unsafe, but is not documented. about solana-starter-kit HOT 3 CLOSED

#[derive(Accounts)]
pub struct Execute<'info> {
    #[account(init, payer = user, space = 100)]
    pub decimal: Account<'info, Decimal>,
    #[account(mut)]
    pub user: Signer<'info>,
    /// CHECK: This is not dangerous because we don't read or write from this account
    pub chainlink_feed: AccountInfo<'info>,
    /// CHECK: This is not dangerous because we don't read or write from this account
    pub chainlink_program: AccountInfo<'info>,
    #[account(address = system_program::ID)]
    /// CHECK: This is not dangerous because we don't read or write from this account
    pub system_program: AccountInfo<'info>,
}

deca28@PIC4229:/mnt/d/Work/Learn Solana/facebook-solana/programs/programs/programs$ anchor build
BPF SDK: /home/deca28/.local/share/solana/install/releases/1.9.1/solana-release/bin/sdk/bpf
cargo-build-bpf child: rustup toolchain list -v
cargo-build-bpf child: cargo +bpf build --target bpfel-unknown-unknown --release
   Compiling programs v0.1.0 (/mnt/d/Work/Learn Solana/facebook-solana/programs/programs/programs)
    Finished release [optimized] target(s) in 15.66s
cargo-build-bpf child: /home/deca28/.local/share/solana/install/releases/1.9.1/solana-release/bin/sdk/bpf/scripts/strip.sh /mnt/d/Work/Learn Solana/facebook-solana/programs/target/bpfel-unknown-unknown/release/programs.so /mnt/d/Work/Learn Solana/facebook-solana/programs/target/deploy/programs.so
cargo-build-bpf child: /home/deca28/.local/share/solana/install/releases/1.9.1/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/llvm-readelf --dyn-symbols /mnt/d/Work/Learn Solana/facebook-solana/programs/target/deploy/programs.so

To deploy this program:
  $ solana program deploy /mnt/d/Work/Learn Solana/facebook-solana/programs/target/deploy/programs.so
The program address will default to this keypair (override with --program-id):
  /mnt/d/Work/Learn Solana/facebook-solana/programs/target/deploy/programs-keypair.json
Error: 
        /mnt/d/Work/Learn Solana/facebook-solana/programs/programs/programs/src/lib.rs:157:8
        Struct field "system_program" is unsafe, but is not documented.
        Please add a `/// CHECK:` doc comment explaining why no checks through types are necessary.
        See https://book.anchor-lang.com/chapter_3/the_accounts_struct.html#safety-checks for more information.

deca28@PIC4229:/mnt/d/Work/Learn Solana/facebook-solana/programs/programs/programs$ anchor build
BPF SDK: /home/deca28/.local/share/solana/install/releases/1.9.1/solana-release/bin/sdk/bpf
cargo-build-bpf child: rustup toolchain list -v
cargo-build-bpf child: cargo +bpf build --target bpfel-unknown-unknown --release
   Compiling programs v0.1.0 (/mnt/d/Work/Learn Solana/facebook-solana/programs/programs/programs)
    Finished release [optimized] target(s) in 5.97s
cargo-build-bpf child: /home/deca28/.local/share/solana/install/releases/1.9.1/solana-release/bin/sdk/bpf/scripts/strip.sh /mnt/d/Work/Learn Solana/facebook-solana/programs/target/bpfel-unknown-unknown/release/programs.so /mnt/d/Work/Learn Solana/facebook-solana/programs/target/deploy/programs.so
cargo-build-bpf child: /home/deca28/.local/share/solana/install/releases/1.9.1/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/llvm-readelf --dyn-symbols /mnt/d/Work/Learn Solana/facebook-solana/programs/target/deploy/programs.so

To deploy this program:
  $ solana program deploy /mnt/d/Work/Learn Solana/facebook-solana/programs/target/deploy/programs.so
The program address will default to this keypair (override with --program-id):
  /mnt/d/Work/Learn Solana/facebook-solana/programs/target/deploy/programs-keypair.json