Go to the Previous Page on the Back Button Oracle Apex

Step 1:  Create two application items. 

Step 2: Create an application process like below

IF :AI_CURRENT_PAGE <> :APP_PAGE_ID  

THEN  
:AI_PREVIOUS_PAGE:=:AI_CURRENT_PAGE;  
END IF; 

:AI_CURRENT_PAGE:=:APP_PAGE_ID;

Step 3: Put the    &AI_PREVIOUS_PAGE.    item into the Back Button target page.