yes。 看来你们的编号是primary key （或part of primarykey） 不许有重复的

The primary key of a relational table uniquely identifies each record in
the table. It can either be a normal attribute that is guaranteed to be
unique (such as Social Security Number in a table with no more than one
record per person) or it can be generated by the DBMS (such as a
globally unique identifier, or GUID, in Microsoft SQL Server). Primary
keys may consist of a single attribute or multiple attributes in
combination.