Interacting current sources
The main relevant parameter for a constant current generator is the compliance voltage - this is the voltage at the load for which the current will depart from the intended current by some defined error amount.

In your question one of the generators will create a voltage across the load of the other generator that will cause its current to vary if the voltage is large enough.

What is the reason behind your question?

Current sources, especially AC ones, are unusual and VERY rarely used in practice. I have only once used an AC current source in 40+ years of electronic design.

The nearest thing to an AC constant current source in common use is to feed an AC voltage source through a resistor that is high in relation to the load.  This was the technique normally used to drive the recording head in analogue tape recorders. The inductance of the head would cause the recording current to drop at higher frequencies if that was not done.  The resistor value was chosen to be high relative to the inductive reactance of the head at the highest frequency needed (~10-20kHz for audio).