Mysql Stored Procedure Error

I have a connection table that I need to delete every month to include new data. I made a stored procedure to automate this process. This table has about 3 million rows in a monthly period. This may increase or decrease a bit each month.

I made the following code, but Mysql is returning an error that I can not identify.

The error:

  

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '@delete_ligacoes: loop SET @lines: = (select id from links where id> = @min' at line 9

Line 9:

  

@delete_connections: loop

If someone can help me ...

BEGIN
SET @minimo = 0;

@delete_ligacoes: loop
    SET @linhas := (select id from ligacoes where id >= @minimo order by id limit 1000, 1);
    prepare stmt from @linhas;
    execute stmt;
    deallocate prepare stmt;

    if @linhas is null then
        leave @delete_ligacoes;
    end if;

    SET @queryDelete := (DELETE FROM 'ligacoes' WHERE id >= @minimo AND id < @linhas);
    prepare stmt1 from @queryDelete;
    execute stmt1;
    deallocate prepare stmt1;

    SET @minimo = @linhas;
end loop;

    SET @varDelete := (DELETE FROM 'ligacoes' WHERE id >= @minimo);
    prepare stmt2 from @varDelete;
    execute stmt2;
    deallocate prepare stmt2;
END;