RSS and Twitter duplicates

Hey all,

I’m trying to automate my RSS feed to post to X (Twitter) when a new article is posted. I use a “watch RSS feed items” module and “create a post” X module.

It works great when I start it up for a few hours (random, sometimes 3, sometimes 10) but then it starts getting errors “403: Forbidden can’t post duplicate posts”. Not sure why this happens, I don’t post the same articles. I checked the RSS feed with a validator and there are no duplicate items in it.

Any ideas how to fix this?