To fix this error:
in src/map/itemdb.cpp invalidWarning(node["Defense"], "Item defense %d exceeds DEFTYPE_MAX (%d), capping to DEFTYPE_MAX.\n", def, DEFTYPE_MAX);
to
//invalidWarning(node["Defense"], "Item defense %d exceeds DEFTYPE_MAX (%d), capping to DEFTYPE_MAX.\n", def, DEFTYPE_MAX);
Thanks to @sader1992