[Koha] Books to be checked in at home library message

Hi I have a koha site which used to run one branch library. Now I have brought in another branch library, so they are two independent libraries. I think there is any mis-configuration of one of the system preferences. Now, when a book is been checked in at one of the libraries to which it belongs, a message is popping up indicating that the book should be checked in at the home library. I can not figure out how to resolve this issue Regards, Admire