Hi @JWhit_7 ,
I will provide the answer below assuming here that you are working with a SharePoint List as data source. If this is not the case, let me know and we can investigate it deeper 🙂
Although you may have an "ID" column in your List, it not necessarily matches with the "unique ID" used by the system to identify the record. For example, even in Lists that you don't have an ID column, Power Automate will still display an "ID" property when working with dynamic content:

In general, the "user friendly ID" (in your case, "JFF29454748-12009/02/2024") is set in a different column from the system "ID", which will also be an integer. So you can solve your error in the "Update item" by just assigning the "ID" dynamic content (which refers to system ID) related to the List record.
If your flow design doesn't have the system ID data but only the user friendly one ("JFF29454748-12009/02/2024"), you can use a "Get items" action and filter the records by user friendly ID. After that, you will be able to access the record's system ID.
Let me know if it works for you or if you need any additional help!
-------------------------------------------------------------------------
If this is the answer for your question, please mark the post as Solved.
If this answer helps you in any way, please give it a like.
http://digitalmill.net/
https://www.linkedin.com/in/raphael-haus-zaneti/