Declaring the same variable twice within the same scope is error-prone. Thus, redeclaring variables twice within the same scope should be avoided.

## Noncompliant Code Example

     1  @myvar: blue;   /* Noncompliant: redeclared line 2 and 11 */
     2  @myvar: white;
     3
     4  .mybox {
     5    @size: 1px;    /* Noncompliant: redeclared line 8 */
     6    color: @myvar;
     7    width: @size;
     8    @size: 2px;
     9  }
    10
    11  @myvar: red;

## Compliant Solution

    1  @myvar: red;
    2  .mybox {
    3    @size: 1px;
    4    color: @myvar;
    5    width: @size;
    6  }