I've set up Facebook Conversion API using Facebook App. However, it is only tracking Purchases through the server which limits some retargeting options because Pixel doesn't track Page or Content Views for me for some reason. So, I've manually added all events on my Facebook Events Set Up page, and it worked fine until today.
Now I have this issue:
Solution Facebook is giving is to assign event IDs so Deduplication works properly. However, I can't find a way to implement it on Shopify. Below are suggestions from Facebook.