Why a Pipeline keeps stuck in queued status forever in Azure Data Factory?

Question

I've a Pipeline to execute several Data Flows with in Azure Data Factory, some weeks ago it was running properly and lasted around 25 minutes to finish, I've had to make a little adjustment in one filter (specifically, it was in the last and only Data Flow that keeps in queued forever, this Data Flow inserts into SQL DB). After the adjustment, without explanation everytime Pipeline is running it just keeps static on queued status and never ends:

I tried to delete the filter where was the adjustment, recreate the Pipeline, and as you see guys, is still not working, the last Data flow in the Pipeline keeps in the same status (30 to 40 hours waiting on queued and nothing happen while the other pipelines are running well):

Do you know, guys if is there any configuration that I'm missing? here is what I've configured in my pipeline:

Note: I'm just working with 500,000 records, and even though I upgraded the Core Count configuration to 8 Driver Cores but I got next error:

Thanks by the way, best regards