when I used for the second time the "Test stream" function, nothing happened because my lead exhausted the content of the stream during the first test.
I changed the member status to "Not in program" but it keep the exhausted information when I tested again the stream...
Is there a way to erase the "Content exhausted information ?
No, you cannot. Marketo will remember which content the lead already got.
You will have to use another lead.