LuckeRu:
I set the "data send per second" to 1 milisecond. Can it damage/crash arduino or anything else?
I don't think an nRF24 can send a message every millisec. I think a round-trip message and acknowledgement takes 3 to 5 millisecs. Trying to send too often might mean that messages get mixed up.
You also need to consider whether the receiving Arduino has time to do anything useful with the data it receives.
I find it hard to believe that a message rate of more than 10 per second is actually needed, and maybe 5 per second would be sufficient.
...R