Hi,
Yes, you need to load old data thru repair full request with proper selections.
From info pack-->scheduler--> repair full request.
for your existing info pack if repair full req was disabled then create new info pack with full load.
Go to newly created new info pack-->scheduler--> repair full req. Just you can load upto PSA only. you delta load will take care to load data to further.
for example:
you started loading repair full req at 11:00AM and finished at 1:00PM on same day.
for the same day you daily/delta load will start at 2:00PM, in this case loaded repair request will be loaded to further targets. if that's ok for you then no issues.
Delta will won't disturb - no fear about that.
it won't effect your daily load.
Thanks