option not allowed when generating a new recoded variable

hi when recoding this variable :
tabulation of amanno00

S1 MAIN |
| Freq. Percent Cum.
------------+-----------------------------------
1 | 31 0.18 0.18
2 | 69 0.40 0.58
3 | 120 0.70 1.28
4 | 5,665 32.97 34.25
5 | 6,138 35.72 69.97
6 | 5,096 29.66 99.62
7 | 65 0.38 100.00
------------+-----------------------------------
Total | 17,184 100.00

recode amanno00 (7=.)(1/2=1)(3=2)(4=3)(5=4)(6=5), genanno
the stata ouput is

option genanno not allowed