[Koha] software error

[vinod kv]

We hold one book  for a user, after it was check in, we tried to issue that
particular


Software error:

DBIx::Class::Storage::DBI::_dbh_execute(): Duplicate entry '1' for key
'PRIMARY' at /usr/share/koha/lib/Koha/Object.pm line 121

For help, please send mail to the webmaster ([no address given]), giving
this error message and the time and date of the error.




sir  how to solve this problem