Duplicate ID

Hello to the community!
I’m trying to validate a website through the w3 validator and the validator finds these two errors:
1) `Error: Duplicate ID primary-site-navigation.

From line 191, column 87; to line 191, column 314

vigation”><nav class=”site-navigation ast-flex-grow-1 navigation-accessibility site-header-focus-item” id=”pri…abel=”Πλοήγηση Ιστοτόπου” itemtype=”https://schema.org/SiteNavigationElement&#8221; itemscope=”itemscope”><div c`
2)`Error: Duplicate ID ast-hf-menu-1.

From line 191, column 360; to line 191, column 482

ine-flex”><ul id=”ast-hf-menu-1″ class=”main-header-menu ast-menu-shadow ast-nav-menu ast-flex submenu-with-border stack-on-mobile”><li cl`

Any clue how to fix these? Thank you so much in advance!

The page I need help with: [log in to see the link]