Firstly, I am not sure that I understand the exact problem. You can correct me if I did not understand the problem truely. You want to paste a task’s name to the field (link to record to the Projects table) on the Task table. Sometimes these kind of entries into a linked record field raise errors. So, you should be sure about you are building a working automation. You may go step by step and check which data you try to put on the linked record field. So, check what comes from the triggered record for updating. Choosing record id works always better in this kind of updating automations. For example, you can manually write a record id of a record from the projects table, then if it works the problem is because of another reasons. Also sometimes fetching lookup fields couses errors, try to use rollup. I wish you would solve the problem.