What I did.
Open or open from grf
Save as "1@prt"
I use some map cache from eAthena and addition
I updated my rdata or data.grf morroc changes yet I cant walk o tje middle
duplicated the map prontera and named it something else
I uploaded it and worked fine
Although I cant walk on some cell and if I warped or do @jump I somehow end up somewhere in map. Like black parts where I still cant walk or litteraly inside buildings