. tsset id week
       panel variable:  id (unbalanced)
        time variable:  week, 1 to 425, but with gaps
                delta:  1 unit
用xtreg,fe都好好的，用xtscc,fe就报错
xtscc percen_reason1 age,fe
week is not regularly spaced: there are contemporaneous gap(s) across all subjects in id
r(101);


有人知道为什么么，求指教，求帮助！