What means "Warning: Deprecated Saurus API tag {print_header} .."?

Error message "Warning: Deprecated Saurus API tag {print_header} or {print_footer} found in template ..".

Saurus APi tags {print_header} and {print_footer} are deprecated in version4. Conversion script displayes the list of  template names containing deprecated tags. Open the templates and replace tags as following:

{print_footer} replacement code:

{init_article name="footer" system_message="footer"}
{$footer->buttons}
{$footer->lead}
{$footer->body}

{print_header} replacement code:

{init_article name="header" system_message="headlogo"}
{$header->buttons}
{$header->lead}
{$header->body}