BLE_GAP_CHAR_INCL_CONFIG_EXCLUDE_WITH_SPACE

#define BLE_GAP_CHAR_INCL_CONFIG_EXCLUDE_WITH_SPACE   (1)

#include <ble_gap.h>

Do not include the characteristic in the Attribute table. The SoftDevice will reserve the attribute handles which are otherwise used for this characteristic. By reserving the attribute handles it will be possible to upgrade the SoftDevice without changing handle of the Service Changed characteristic.