Variable is defined but not used (But used below)

Question

Shopify indicates an error on the top line of the code that my variable is defined but not use can anyone teach me what's the logic behind it because I used the variable below

{% assign compareAtPriceMax = product.compare_at_price_max | times: 1.16 %}
{%- capture price_max -%}
{%-
 render 'price-ui-templates',
 template: 'price-max',
 value: compareAtPriceMax,
  -%}
{%- endcapture -%}