遇到分区问题，说必须包含主键，怎么解决

[SQL] alter TABLE users partition by RANGE(YEAR(uregtime))
(partition p4 values less than (2010),
partition p5 values less than (2015),
partition p6 values less than MAXVALUE
);
[Err] 1503 - A PRIMARY KEY must include all columns in the table's partitioning function