Hi,
I want to create a time series variable, but when I enter the commend tsset date, I receive the error:

'' repeated time values within panel
r(451);''

My panel does have the same time values, since my data consists of 529 observations, and some of them occurred in same date (so I cannot just delete them).
I've been trying to find solution to this problem, but I can't seem to find any (I'm using stata 13).
I would appreciate your help!