In the object RecordAction are a lot of old (> 0,5 year) records for screenflows with status = 'New' or 'Started'. Can I just delete those old  when I am sure that those screenflows will never be ended?

Im trying to call a flow from a process to start an invocable method.
The process waits for a certain status on the case object to start the flow with a scheduled action: 

I get a 'pending uncommitted changes' error everytime I try do call the flow. 

My flow looks like this: 


Any suggestions?