Since Updating to version 18, I get Item is not synced across your devices

I recently updated to version 18, since than when i open my apple music i see duplicates of almost all the songs there. one of them works fine, the other say "Item is not synced across your devices".

i tried to resync it with the mac (although those songs don't exist on the mac but just on my iphone) and i can't get it sorted. i just don't want to see those duplicates in my songs lists. what should i do?