SQL ERROR "Duplicate entry" in the Web scenarios page

Web scenario edit page (I reproduce this issue in template, witch is linked to the other hosts)
Enter new application and double click on the save button.

Error in query [INSERT INTO applications (name,hostid,applicationid) VALUES ('CPUXX','10125','500')] [Duplicate entry '10125-CPUXX' for key 2]
SQL statement execution has failed "INSERT INTO applications (name,hostid,applicationid) VALUES ('CPUXX','10125','500')".
Cannot add new application "CPUXX".