Inventory during upgrade

Dear Experts,

We are in process of upgrading 11.2.0.4 to 19c. As part of it,we are installing 19c software. 

In existing environment,we dont have global inventory, no oraInst.loc in /etc.

While installing 19c, it prompts for inventory location

Oracle Home for 11g-->/u02/CRP/db/tech_st/11.2.0

Oracle Home for 19c-->/u02/CRP/db/19chome

Existing inventory:

-bash-4.2$ cd /u02/CRP/db/tech_st/11.2.0

-bash-4.2$ cat oraInst.loc

inventory_loc=/u02/CRP/db/tech_st/11.2.0/oraInventory

inst_group=dba

While installing 19c,we entered inventory location as /u02/CRP/oraInventory. After the installation, oraInst.loc created under /etc