Final answer:
The problem with the company's database(s) could be due to lack of communication, outdated information, or data entry errors.
Step-by-step explanation:
The problem with the company's database(s) could be that it is not properly updated or synchronized with other systems. It seems that the company's database is not aware of the fact that the customer has already installed an alarm system. This could be due to a lack of communication between the systems responsible for tracking installations and the system responsible for sending out marketing offers.
Another possibility is that the company's database(s) may have outdated or incorrect information. If the customer recently moved or changed their address, the database may still have the old address on record, leading to the incorrect mailings.
Furthermore, there could be a potential issue with the data entry process. If the customer's new address was not accurately entered or if there was a typographical error, the database would continue to send mailings to the wrong address.