Circuit: ex2a lib problem

Error on line 12 : vcheck2 9 check2 2.0v
device already exists, existing one being used
Doing analysis at TEMP = 27.000000 and TNOM = 27.000000


No. of Data Rows : 1
v(check1) = 0.000000e+00
v(check2) = 0.000000e+00
info: ok