请问primary key for table xs ' is not unique 原因

[nikewjh]

sqlstate:23000
[sybase][odbc driver][ adaptive server anywhere] integrity constraint violation:primary key for table xs ' is not unique
这是我写入的SQL语句

insert into xs
values('081101','王林','计算机',1,'1990-02-10',50,null);
execute 时出现的语句，xs是我定义的表，主键设为学生 ，我不知道问题出在哪里，我刚学，自己搞了很久都不会，希望有朋友可以指点一下。

[Nate]

违反主键唯一性，1#正解

[ribut9225]

楼上二位都对
违反主键规则，数据冲突了

[yyoinge]

Probable cause
You attempted to add a new row to a table, but the new row has the same primary key as an existing row. The database has not added the incorrect row to the database. For example, you might have added a student with student number 86004 and there is already a row for a student with that number.

[nikewjh]

谢谢你们，我以为执行就会显示表格，就重复点了执行，然后就出错了，谢谢各位。

[wag_enu]

看看是不是已经存在 王林 的学生了。