Steps to reproduce:

Link the template "Nginx by Zabbix agent" to a host.

Result:

An item is added for "CPU utilization" for Nginx.
Via the template "Linux by Zabbix agent" also an item "CPU utilization" is generated.
So when in a graph the item "CPU utilization" of the node shall be displayed, two lines are displayed instead of one.

In Zabbix 6 the CPU utilization item for Nginx was called "Nginx: CPU utilization", so the items were not called the same.

Expected:

Give the item names of the Nginx template again a heading "Nginx: ".