How to Fixed "the specified Value could not be applied. please enter a different value" in animation constrain inventor studio?

i wonder, am i wrong with my design about that. so, first time, i click "constrain" in animation studio, and put my value in 0 into 360 degree to rotate my part like gear. then i click "specify" and my start is 7 second to 10 second. then i apply. but this word appear and say "the specified Value could not be applied. please enter a different value" what is that mean? please help me