shivav23: From what I understand from your post you have two
options either you can make seperate documents for
all your flights you have done from your initial school
and ie; Solo PIC X-C, PIC, IR (Actual/Simulated/FTD) Time etc
And do same from the other school you will be going to get
your recency done.
Or you can make just one Solo X-C certificate
which states all your X-C flight details and put an asterix(*)
for all the flights you have done from from your initial school
and get it attested from your CFI.