Hi Sine ,
This change is done only once .
For equipment task list you select the object 0470 not 0490 as demonstrated in my example
For object 0470 there is no need for this customization change since the value there is already IA01.
In your screenshot you need to modify the value IA01 to IA05
this is the error that the note above have to be corrected
Regards,
Ziv