@ -173,12 +173,12 @@ CommandCost CmdChangeTimetable(TileIndex tile, DoCommandFlag flags, uint32 p1, u
switch (mtf) {
case MTF_WAIT_TIME:
wait_time = p2;
if (clear_field) assert(wait_time == 0);
if (clear_field && wait_time != 0) return CMD_ERROR;
break;
case MTF_TRAVEL_TIME:
travel_time = p2;
if (clear_field) assert(travel_time == 0);
if (clear_field && travel_time != 0) return CMD_ERROR;
case MTF_TRAVEL_SPEED: